HYDROCEPHALUS. Acc.u.mulation of fluid in the membranes about the brain.

HYDROTHORAX. Acc.u.mulation of fluid in the chest cavities.

HYGIENE. The principles or rules for the promotion or preservation of health.

HYMEN. Described on page 687. HYPERSEMIA. Full of blood. Congestion.

HYPERTROPHY. Enlargement, thickening.

HYPOCHONDRIAC. A person, usually dyspeptic, who is unreasonably gloomy, particularly about his health.

HYPODERMIC SYRINGE. An instrument having a very fine tube and needle-like point, by which medicines are lodged immediately under the skin.

HYSTEROTOME. An instrument described and ill.u.s.trated on page 696.

I

IDIOPATHIC. Primary: not depending on another disease.

ILLICIT. Not permitted; unlawful.

ILLUSIONS. See HALLUCINATIONS.

IMPACTED. Wedged. Applied to feces which have remained in the r.e.c.t.u.m a long time.

IMPERFORATE. Without a natural opening.

IMPOTENCY. Loss of s.e.xual power.

IMPREGNATION. Imparting the vital principle of the sperm-cell to the germ-cell, by which a new being is created.

INCIPIENT. Commencement; first stage.

INDEPENDENT PHYSICIAN. Defined on page 295.

INDIGENOUS. Native. Grows in a country.

INDOLENT. Painless; a term applied to tumors.

INDURATION. Hardening of a part or organ.

INFECTION. A prevailing disease. A disease spread only by contact, as itch, syphilis, etc.

INFILTRATION. The pa.s.sage of fluid into the cellular tissue; as in General Dropsy.

INFLAMMATION. Defined on page 398.

INFUSION. Defined on page 303.

INGUINAL Ca.n.a.l. A ca.n.a.l situated in the groin, through which the spermatic cord pa.s.ses. The common seat of Hernia. Illus. page 862.

INOCULATE. To communicate a disease by inserting matter in the flesh; as by vaccination.

INORGANIC. Mineral. Bodies without organs.

INSALIVATION. Mixed with the saliva of the mouth, as food.

INSEMINATION. The emission of sperm in coition.

INSPIRATION. Drawing in the breath.

INTEGUMENT. The skin.

INTENTION, HEALING BY FIRST. Healing without the formation of pus.

INTERCOSTAL. Between the ribs.

INTERMITTENT. Having paroxysms or intervals.

INTERNAL EAR. Described on page 110; Illus. page 109.

INTUSSUSCEPTION. One part of the intestines forced into another part.

INv.a.g.i.n.aTION. See INTUSSUSCEPTION

IRIDECTOMY. A surgical operation for the removal of the Iris.

IRIS. A curtain which gives the eye its color.

ISOLATION. Separation from others.

K.

KADESH-BARNEA. The holy place in the desert of wandering; the headquarters of the Israelites for 37 years.

L

LABORATORY. The work-room of a chemist or pharmacist.

LACERATION. A wound made by tearing.

LACHRYMAL. Belonging to the tears.