HY. Defined on page 294.

HYALINE CASTS. Glassy appearing substances found by the microscope in
urine in chronic Bright's Disease.

HYDRAGOGUES. Cathartics which produce copious watery discharges.

HYDROCELE. Accumulation of fluid in the scrotum.

HYDROCEPHALUS. Accumulation of fluid in the membranes about the brain.

HYDROTHORAX. Accumulation 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 illustrated 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 rectum a
long time.

IMPERFORATE. Without a natural opening.

IMPOTENCY. Loss of sexual 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 passage of fluid into the cellular tissue; as in
General Dropsy.

INFLAMMATION. Defined on page 398.

INFUSION. Defined on page 303.

INGUINAL CANAL. A canal situated in the groin, through which the
spermatic cord passes. 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