fusiform[Microb], wedge-shaped, cuneiform; cuneate[obs3], multangular[obs3], oxygonal[obs3]; triangular, trigonal[obs3], trilateral; quadrangular, quadrilateral; foursquare; rectangular, square, multilateral; polygonal &c. n.; cubical, rhomboid, rhomboidal, pyramidal.

#245. Curvature. -- N. curvature, curvity[obs3], curvation[obs3]; incurvature[obs3], incurvity

; incurvation[obs3]; bend; flexure, flexion, flection[obs3]; conflexure

; crook, hook, bought, bending; deflection, deflexion[obs3]; inflection, inflexion[obs3]; concameration[obs3]; arcuation[obs3], devexity

, turn, deviation, detour, sweep; curl, curling; bough; recurvity[obs3], recurvation[obs3]; sinuosity &c. 248.

kink.

carve, arc, arch, arcade, vault, bow, crescent, half-moon, lunule[obs3], horseshoe, loop, crane neck; parabola, hyperbola; helix, spiral; catenary[obs3], festoon; conchoid[obs3], cardioid; caustic; tracery; arched ceiling, arched roof; bay window, bow window.

sine curve; spline, spline curve, spline function; obliquity &c. 217.

V. be curved &c. adj[intrans].; curve, sweep, sway, swag, sag; deviate &c. 279; curl, turn; reenter.

[trans] render curved &c. adj.; flex, bend, curve, incurvate[obs3]; inflect; deflect, scatter[Phys]; refract (light) 420; crook; turn, round, arch, arcuate, arch over, concamerate[obs3]; bow, curl, recurve, frizzle.

rotundity &c. 249; convexity &c. 250.

Adj. curved &c. v.; curviform[obs3], curvilineal[obs3], curvilinear; devex

, devious; recurved, recurvous[obs3]; crump[obs3]; bowed &c. v.; vaulted, hooked; falciform[obs3], falcated[obs3]; semicircular, crescentic; sinusoid[Geom], parabolic, paraboloid; luniform[obs3], lunular[obs3]; semilunar, conchoidal[obs3]; helical, double helical, spiral; kinky; cordiform[obs3], cordated[obs3]; cardioid; heart shaped, bell shaped, boat shaped, crescent shaped, lens shaped, moon shaped, oar shaped, shield shaped, sickle shaped, tongue shaped, pear shaped, fig shaped; kidney- shaped, reniform; lentiform[obs3], lenticular; bow-legged &c. (distorted) 243; oblique &c. 217; circular &c. 247.

aduncated[obs3], arclike[obs3], arcuate, arched, beaked; bicorn[obs3], bicornuous[obs3], bicornute[obs3]; clypeate[obs3], clypeiform[obs3]; cymbiform[obs3], embowed[obs3], galeiform[obs3]; hamate[obs3], hamiform[obs3], hamous[obs3]; hooked; linguiform[obs3], lingulate[obs3]; lobiform[obs3], lunate, navicular[obs3], peltate[obs3], remiform[obs3], rhamphoid[obs3]; rostrate[obs3], rostriferous[obs3], rostroid[obs3]; scutate[obs3], scaphoid[obs3], uncate[obs3]; unguiculate[obs3], unguiform[obs3].

#246. Straightness. -- N. straightness, rectilinearity[obs3], directness; inflexibility &c. (stiffness) 323; straight line, right line, direct line; short cut.

V. be straight &c. adj.; have no turning; not incline to either side, not bend to either side, not turn to either side, not deviate to either side; go straight; steer for &c. (directions) 278.

render straight, straighten, rectify; set straight, put straight; unbend, unfold, uncurl &c. 248, unravel &c. 219, unwrap.

Adj. straight; rectilinear, rectilineal[obs3]; direct, even, right, true, in a line; unbent, virgate &c. v[obs3].; undeviating, unturned, undistorted, unswerving; straight as an arrow &c. (direct) 278; inflexible &c. 323.

laser-straight; ramrod-straight.

#247. [Simple circularity.] Circularity. -- N. circularity, roundness; rotundity &c. 249.

circle, circlet, ring, areola, hoop, roundlet[obs3], annulus, annulet[obs3], bracelet, armlet; ringlet; eye, loop, wheel; cycle, orb, orbit, rundle, zone, belt, cordon, band; contrate wheel[obs3], crown wheel; hub; nave; sash, girdle, cestus[obs3], cincture, baldric, fillet, fascia, wreath, garland; crown, corona, coronet, chaplet, snood, necklace, collar; noose, la.s.so, la.s.soo[obs3].

ellipse, oval, ovule; ellipsoid, cycloid; epicycloid[Geom], epicycle; semicircle; quadrant, s.e.xtant, sector.

sphere &c. 249.

V. make round &c. adj.; round.

go round; encircle &c. 227; describe a circle &c. 311.

Adj. round, rounded, circular, annular, orbicular; oval, ovate; elliptic, elliptical; egg-shaped; pear-shaped &c. 245; cycloidal &c.

n[obs3].; spherical &c. 249.

Phr. "I watched the little circles die" [Tennyson].

#248. [Complex curvature.] Convolution. -- N. winding &c. v.; convolution, involution, circ.u.mvolution; wave, undulation, tortuosity, anfractuosity[obs3]; sinuosity, sinuation[obs3]; meandering, circuit, circ.u.mbendibus[obs3], twist, twirl, windings and turnings, ambages[obs3]; torsion; inosculation[obs3]; reticulation &c. (crossing) 219; rivulation[obs3]; roughness &c. 256.

coil, roll, curl; buckle, spiral, helix, corkscrew, worm, volute, rundle; tendril; scollop[obs3], scallop, escalop[obs3]; kink; ammonite, snakestone[obs3].

serpent, eel, maze, labyrinth.

knot.

V. be convoluted &c. adj.; wind, twine, turn and twist, twirl; wave, undulate, meander; inosculate[obs3]; entwine, intwine[obs3]; twist, coil, roll; wrinkle, curl, crisp, twill; frizzle; crimp, c.r.a.pe, indent, scollop[obs3], scallop, wring, intort[obs3]; contort; wreathe &c. (cross) 219.

Adj. convoluted; winding, twisted &c. v.; tortile[obs3], tortive

; wavy; undated, undulatory; circling, snaky, snake-like, serpentine; serpent, anguill[obs3], vermiform; vermicular; mazy, tortuous, sinuous, flexuous, anfractuous[obs3], reclivate[obs3], rivulose[obs3], scolecoid[obs3]; sigmoid, sigmoidal[Geom]; spiriferous[obs3], spiroid[obs3]; involved, intricate, complicated, perplexed; labyrinth, labyrinthic[obs3], labyrinthian[obs3], labyrinthine; peristaltic; daedalian[obs3]; kinky, knotted.

wreathy[obs3], frizzly, crepe, buckled; raveled &c. (in disorder) 59.

spiral, coiled, helical; cochleate, cochleous; screw-shaped; turbinated, turbiniform[obs3].

Adv. in and out, round and round; a can of worms; Gordian knot.

#249. Rotundity. -- N. rotundity; roundness &c. adj.; cylindricity[obs3]; sphericity, spheroidity[obs3]; globosity[obs3].

cylinder, cylindroid[obs3], cylindrical; barrel, drum; roll, roller; rouleau[obs3], column, rolling-pin, rundle.

cone, conoid[obs3]; pear shape, egg shape, bell shape.

sphere, globe, ball, boulder, bowlder[obs3]; spheroid, ellipsoid; oblong spheroid; oblate spheroid, prolate spheroid; drop, spherule, globule, vesicle, bulb, bullet, pellet, pelote[obs3], clew, pill, marble, pea, k.n.o.b, pommel, horn; knot (convolution) 248.

curved surface, hypersphere; hyperdimensional surface.

V. render spherical &c. adj.; form into a sphere, sphere, roll into a ball; give rotundity &c. n.; round.

Adj. rotund; round &c. (circular) 247; cylindric, cylindrical, cylindroid[obs3]; columnar, lumbriciform[obs3]; conic, conical; spherical, spheroidal; globular, globated[obs3], globous[obs3], globose; egg shaped, bell shaped, pear shaped; ovoid, oviform; gibbous; rixiform[obs3]; campaniform[obs3], campanulate[obs3], campaniliform[obs3]; fungiform[obs3], bead-like, moniliform[obs3], pyriform[obs3], bulbous; tres atque rotundus[Lat]; round as an orange, round as an apple, round as a ball, round as a billiard ball, round as a cannon ball.

-- 3. Superficial Form --

#250. Convexity. -- N. convexity, prominence, projection, swelling, gibbosity[obs3], bilge, bulge, protuberance, protrusion; camber, cahot [obs3][N. Am.], thank-ye-ma'am [U.S.]. swell.

intumescence; tumour[Brit], tumor; tubercle, tuberosity[Anat]; excrescence; hump, hunch, bunch.

boss, embossment, hub, hubble [convex body parts] tooth[U.S.], k.n.o.b, elbow, process, apophysis[obs3], condyle, bulb, node, nodule, nodosity[obs3], tongue, dorsum, b.u.mp, clump; sugar loaf &c. (sharpness) 253; bow; mamelon[obs3]; molar; belly, corporation

!, pot belly, gut[coll]; withers, back, shoulder, lip, f.l.a.n.g.e.

[convexities on skin] pimple, zit [slang]; wen, wheel, papula[Med], pustule, pock, proud flesh, growth, sarcoma, caruncle[obs3], corn, wart, pappiloma, furuncle, polypus[obs3], fungus, fungosity[obs3], exostosis[obs3], bleb, blister, blain[obs3]; boil &c. (disease) 655; airbubble[obs3], blob, papule, verruca.

[convex body parts on chest] papilla, nipple, teat, t.i.t [vulgar], t.i.tty [vulgar], b.o.o.b [vulgar], knocker[vulgar], pap, breast, dug, mammilla[obs3].

[prominent convexity on the face] proboscis, nose, neb, beak, snout, nozzle, schnoz[coll].

peg, b.u.t.ton, stud, ridge, rib, jutty, trunnion, snag.

cupola, dome, arch, balcony, eaves; pilaster.

relief, relievo[It], cameo; ba.s.sorilievo[obs3], mezzorilevo[obs3], altorivievo; low relief, bas relief[Fr], high relief.

hill &c. (height) 206; cape, promontory, mull; forehead, foreland[obs3]; point of land, mole, jetty, hummock, ledge, spur; naze[obs3], ness.

V. be prominent &c. adj.; project, bulge, protrude, pout, bouge

[Fr], bunch; jut out, stand out, stick out, poke out; stick up, bristle up, start up, c.o.c.k up, shoot up; swell over, hang over, bend over; beetle.

render prominent &c. adj.; raise 307; emboss, chase.

[become convex] belly out.

Adj. convex, prominent, protuberant, projecting &c. v.; bossed, embossed, bossy, nodular, bunchy; clavate, clavated[obs3], claviform; hummocky[obs3], moutonne[obs3], mammiliform[obs3]; papulous[obs3], papilose[obs3]; hemispheric, bulbous; bowed, arched; bold; bellied; tuberous, tuberculous; tumous[obs3]; cornute[obs3], odontoid[obs3]; lentiform[obs3], lenticular; gibbous; club shaped, hubby [obs3][U.S.], hubbly [obs3][U.S.], k.n.o.bby, papillose, saddle-shaped, selliform[obs3], subclavate[obs3], torose[obs3], ventricose[obs3], verrucose[obs3].

salient, in relief, raised, repousse; bloated &c, (expanded) 194.

#251. Flatness. -- N. flatness &c. adj.; smoothness &c. 255.

plane; level &c. 213; plate, platter, table, tablet, slab.

V. render flat, flatten; level &c. 213.

Adj. flat, plane, even, flush, scutiform[obs3], discoid; level &c.

(horizontal) 213; flat as a pancake, flat as a fluke, flat as a flounder, flat as a board, flat as my hand.

#252. Concavity. -- N. concavity, depression, dip; hollow, hollowness; indentation, intaglio, cavity, dent, dint, dimple, follicle, pit, sinus, alveolus[obs3], lacuna; excavation, strip mine; trough &c. (furrow) 259; honeycomb.

cup, basin, crater, punch bowl; cell &c. (receptacle) 191; socket.

valley, vale, dale, dell, dingle, combe[obs3], bottom, slade[obs3], strath[obs3], glade, grove, glen, cave, cavern, cove; grot[obs3], grotto; alcove, cul-de-sac; gully &c. 198; arch &c. (curve) 245; bay &c. (of the sea) 343.

excavator, sapper, miner.

honeycomb (sponge) 252a.

V. be concave &c. adj.; retire, cave in.

render concave &c. adj.; depress, hollow; scoop, scoop out; gouge, gouge out, dig, delve, excavate, dent, dint, mine, sap, undermine, burrow, tunnel, stave in.

Adj. depressed &c. v.; alveolate[obs3], calathiform[obs3], cup-shaped, dishing; favaginous[obs3], faveolate[obs3], favose[obs3]; scyphiform[obs3], scyphose[obs3]; concave, hollow, stove in; retiring; retreating; cavernous; porous &c. (with holes) 260; infundibul[obs3], infundibular[obs3], infundibuliform[obs3]; funnel shaped, bell shaped; campaniform[obs3], capsular; vaulted, arched.

252a Sponge -- N. sponge, honeycomb, network; frit[Chem], filter.

sieve, net, screen (opening) 260.

Adj. cellular, spongy, spongious[obs3]; honeycombed, alveolar; sintered; porous (opening) 260.

#253. Sharpness. -- N. sharpness &c. adj.; acuity, ac.u.mination[obs3]; spinosity[obs3].

point, spike, spine, spicule[Biol], spiculum[obs3]; needle, hypodermic needle, tack, nail, pin; p.r.i.c.k, p.r.i.c.kle; spur, rowel, barb; spit, cusp; horn, antler; snag; tag thorn, bristle; Adam's needle[obs3], bear gra.s.s [U.S.], tine, yucca.

nib, tooth, tusk; spoke, cog, ratchet.

crag, crest, arete[Fr], cone peak, sugar loaf, pike, aiguille[obs3]; spire, pyramid, steeple.

beard, chevaux de frise[Fr], porcupine, hedgehog, brier, bramble, thistle; comb; awn, beggar's lice, bur, burr, catchweed[obs3], cleavers, clivers[obs3], goose, gra.s.s, hairif[obs3], hariff, flax comb, hackle, hatchel[obs3], heckle.

wedge; knife edge, cutting edge; blade, edge tool, cutlery, knife, penknife, whittle, razor, razor blade, safety razor, straight razor, electric razor; scalpel; bistoury[obs3], lancet; plowshare, coulter, colter[obs3]; hatchet, ax, pickax, mattock, pick, adze, gill; billhook, cleaver, cutter; scythe, sickle; scissors, shears, pruning shears, cutters, wire cutters, nail clipper, paper cutter; sword &c. (arms) 727; bodkin &c.

(perforator) 262; belduque[obs3], bowie knife[obs3], paring knife; bushwhacker [U.S.]; drawing knife, drawing shave; microtome[Microbiol]; chisel, screwdriver blade; flint blade; guillotine.

sharpener, hone, strop; grindstone, whetstone; novaculite[obs3]; steel, emery.

V. be sharp &c. adj.; taper to a point; bristle with.

render sharp &c. adj.; sharpen, point, aculeate, whet, barb, spiculate[obs3], set, strop, grind; chip [flint].

cut &c. (sunder) 44.

Adj. sharp, keen; acute; acicular, aciform[obs3]; aculeated[obs3], ac.u.minated[obs3]; pointed; tapering; conical, pyramidal; mucronate[obs3], mucronated[obs3]; spindle shaped, needle shaped; spiked, spiky, ensiform[obs3], peaked, salient; cusped, cuspidate, cuspidated[obs3]; cornute[obs3], cornuted[obs3], cornicultate[obs3]; p.r.i.c.kly; spiny, spinous[obs3], spicular; th.o.r.n.y, bristling, muricated[obs3], pectinated[obs3], studded, thistly, briary[obs3]; craggy &c. (rough) 256; snaggy, digitated[obs3], two-edged, fusiform[Microb]; dentiform[obs3], denticulated; toothed; odontoid[obs3]; starlike; stellated[obs3], stelliform[obs3]; sagittate[obs3], sagittiform[obs3]; arrowheaded[obs3]; arrowy[obs3], barbed, spurred.

acinaciform; apiculate[obs3], apiculated[obs3]; aristate[obs3], awned, awny[obs3], bearded, calamiform[obs3], cone-shaped, coniform[obs3], crestate[obs3], echinate[obs3], gladiate[obs3]; lanceolate[obs3], lanciform; awl, awl-shaped, lance-shaped, awl-shaped, scimitar-shaped, sword-shaped; setarious[obs3], spinuliferous[obs3], subulate[obs3], tetrahedral, xiphoid[obs3].