HETAERA. A Greek courtesan. This class was often highly trained in music and social art, and represented the highest grade of culture among Greek women.
HETEROGENY. (1) The spontaneous generation of animals and vegetables, low in the scale of organization, from inorganic elements. (2) That kind of generation in which the parent, whether plant or animal, produces offspring differing in structure or habit from itself, but in which after one or more generations the original form reappears.
HETERONOMOUS. Having a different name.
HOROLOGY. The science of measuring time and of constructing instruments for that purpose.
HYGEIA. The Greek goddess of health; health.
HYPERMETHODIC. Methodic to excess; overmethodic.
HYPERTROPHY. Excessive growth.
INDISCERPTIBLE. Incapable of being destroyed by separation of parts.
INHIBITION. Interference with the normal result of a nervous excitement by an opposing force.
IRRADIATION. The diffusion of nervous stimuli out of the path of normal discharge which, as a result of the excitation of a peripheral end organ may excite other central organs than those directly connected with it.