(Hyp*nol"o*gy) n. [Gr. sleep + -logy.] A treatise on sleep; the doctrine of sleep.

(||Hyp*no"sis) n. [NL., fr. Gr. sleep.] (Med.) Supervention of sleep.

(Hyp*not"ic) a. [Gr. inclined to sleep, putting to sleep, fr. to lull to sleep, fr. sleep; akin to L. somnus, and E. somnolent: cf. F. hypnotique.]

1. Having the quality of producing sleep; tending to produce sleep; soporific.

2. Of or pertaining to hypnotism; in a state of hypnotism; liable to hypnotism; as, a hypnotic condition.

(Hyp*not"ic), n.

1. Any agent that produces, or tends to produce, sleep; an opiate; a soporific; a narcotic.

2. A person who exhibits the phenomena of, or is subject to, hypnotism.

(Hyp"no*tism) n. [Gr. sleep: cf. F. hypnotisme.] A form of sleep or somnambulism brought on by artificial means, in which there is an unusual suspension of some powers, and an unusual activity of others. It is induced by an action upon the nerves, through the medium of the senses, as in persons of very feeble organization, by gazing steadly at a very bright object held before the eyes, or by pressure upon certain points of the surface of the body.

(Hyp`no*ti*za"tion) n. The act or process of producing hypnotism.

(Hyp"no*tize) v. t. [imp. & p. p. Hypnotized ; p. pr. & vb. n. Hypnotizing ] To induce hypnotism in; to place in a state of hypnotism.

(Hyp"no*ti`zer) n. One who hypnotizes.

(||Hyp"num) n. [NL., fr. Gr. moss.] (Bot.) The largest genus of true mosses; feather moss.

(Hy"po-) [Gr. under, beneath; akin to L. sub. See Sub-.]

1. A prefix signifying a less quantity, or a low state or degree, of that denoted by the word with which it is joined, or position under or beneath.

2. (Chem.) A prefix denoting that the element to the name of which it is prefixed enters with a low valence, or in a low state of oxidization, usually the lowest, into the compounds indicated; as, hyposulphurous acid.

(Hy"po) n. Hypochondria. [Colloq.]

(Hy"po), n. [Abbrev. from hyposulphite.] (Photog.) Sodium hyposulphite, or thiosulphate, a solution of which is used as a bath to wash out the unchanged silver salts in a picture. [Colloq.]

(Hy`po*a"ri*an) a. (Anat.) Of or pertaining to a hypoarion.

(||Hy`po*a"ri*on) n.; pl. Hypoaria [NL., fr. Gr. "ypo` beneath + a little egg.] (Anat.) An oval lobe beneath each of the optic lobes in many fishes; one of the inferior lobes. Owen.

(Hy"po*blast) n. [Pref. hypo- + -blast.] (Biol.) The inner or lower layer of the blastoderm; — called also endoderm, entoderm, and sometimes hypoderm. See Illust. of Blastoderm, Delamination, and Ectoderm.

(Hy`po*blas"tic) a. (Biol.) Relating to, or connected with, the hypoblast; as, the hypoic sac.

  By PanEris using Melati.

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