Part 948

Hyb"o*dont (?), a. [Gr. &?; hump + &?;, &?;, a tooth.] (Paleon.) Of, pertaining to, or resembling, an extinct genus of sharks (Hybodus), especially in the form of the teeth, which consist of a principal median cone with smaller lateral ones.

||Hyb"o*dus (?), n. [NL. See Hybodont.] (Paleon.) An extinct genus of ||sharks having conical, compressed teeth.

Hy"brid (?), n. [L. hybrida, hibrida, prob. allied to Gr. &?; wantonness (as if unbridled, lawless, unnatural), perh. akin to Gr. "ype`r over, E. over: cf. F. hybride.] (Biol.) The offspring of the union of two distinct species; an animal or plant produced from the mixture of two species. See Mongrel.

Hy"brid, a. Produced from the mixture of two species; as, plants of hybrid nature.

Hy"brid*ism (?), n. The state or quality of being hybrid.

Hy"brid*ist, n. One who hybridizes.

Hy*brid"i*ty (?), n. Hybridism.

Hy"brid*i`za*ble (?), a. Capable of forming a hybrid, or of being subjected to a hybridizing process; capable of producing a hybrid by union with another species or stock.

Hybridizable genera are rarer than is generally supposed, even in gardens where they are so often operated upon, under circumstances most favorable to the production of hybrids.

J. D. Hooker.

Hy`brid*i*za"tion (?), n. The act of hybridizing, or the state of being hybridized.

Hy"brid*i`ze (?), v. t. [imp. & p. p. Hybridized (?); p. pr. & vb. n. Hybridizing (?).] To render hybrid; to produce by mixture of stocks.

Hy"brid*i`zer (?), n. One who hybridizes.

Hy"brid*ous (?), a. Same as Hybrid.

Hyd"age (?), n. (Law) A land tax. See Hidage.

Hy`dan*to"ic (?), a. (Chem.) Pertaining to, or derived from, hydantoin. See Glycoluric.

Hy*dan"to*in (?), n. [Hydrogen + allantion.] (Chem.) A derivative of urea, C3H4N2O2, obtained from allantion, as a white, crystalline substance, with a sweetish taste; -- called also glycolyl urea.

Hy"da*tid (?), n. [Gr. &?;, &?;, a watery vesicle under the upper eyelid, fr. "y`dwr, "y`datos, water: cf. F. hydatide.] (Zoˆl.) A membranous sac or bladder filled with a pellucid fluid, found in various parts of the bodies of animals, but unconnected with the tissues. It is usually formed by parasitic worms, esp. by larval tapeworms, as Echinococcus and Cúnurus. See these words in the Vocabulary.

Hydatid of Morgagni (Anat.), one of the small pedunculated bodies found between the testicle and the head of the epididymis, and supposed to be a remnant of the M¸llerian duct.

Hy*dat"i*form (?), a. [Hydatid + -form.] Resembling a hydatid.

Hy"da*toid (?), a. [Gr. "y`dwr, "y`datos, water + -oid.] (Anat.) Resembling water; watery; aqueous; hyaloid.

Hy"dr- (?). See under Hydro-.

Hy"dra (?), n.; pl. E. Hydras (#), L. HydrÊ (#). [L. hydra, Gr. "y`dra; akin to "y`dwr water. See Otter the animal, Water.] 1. (Class. Myth.) A serpent or monster in the lake or marsh of Lerna, in the Peloponnesus, represented as having many heads, one of which, when cut off, was immediately succeeded by two others, unless the wound was cauterized. It was slain by Hercules. Hence, a terrible monster.

Gorgons, and Hydras, and Chimeras dire.

Milton.

2. Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort.

3. (Zoˆl.) Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker.

The body is a simple tube, having a mouth at one extremity, surrounded by a circle of tentacles with which it captures its prey. Young hydras bud out from the sides of the older ones, but soon become detached and are then like their parent. Hydras are remarkable for their power of repairing injuries; for if the body be divided in pieces, each piece will grow into a complete hydra, to which fact the name alludes. The zooids or hydranths of marine hydroids are sometimes called hydras.