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- English Word Hyalospongia Definition An order of vitreous sponges, having glassy six-rayed, siliceous spicules; -- called also Hexactinellinae.
- English Word Hyalotype Definition A photographic picture copied from the negative on glass; a photographic transparency.
- English Word Hybernacle Definition Alt. of Hybernation
- English Word Hybernate Definition Alt. of Hybernation
- English Word Hybernation Definition See Hibernacle, Hibernate, Hibernation.
- English Word Hyblaean Definition Pertaining to Hybla, an ancient town of Sicily, famous for its bees.
- English Word Hybodont Definition 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.
- English Word Hybodus Definition An extinct genus of sharks having conical, compressed teeth.
- English Word Hybrid Definition The offspring of the union of two distinct species; an animal or plant produced from the mixture of two species. See Mongrel.
- English Word Hybrid Definition Produced from the mixture of two species; as, plants of hybrid nature.
- English Word Hybridism Definition The state or quality of being hybrid.
- English Word Hybridist Definition One who hybridizes.
- English Word Hybridity Definition Hybridism.
- English Word Hybridizable Definition 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.
- English Word Hybridization Definition The act of hybridizing, or the state of being hybridized.
- English Word Hybridize Definition To render hybrid; to produce by mixture of stocks.
- English Word Hybridized Definition of Hybridize
- English Word Hybridizer Definition One who hybridizes.
- English Word Hybridizing Definition of Hybridize
- English Word Hybridous Definition Same as Hybrid.
- English Word Hydage Definition A land tax. See Hidage.
- English Word Hydantoic Definition Pertaining to, or derived from, hydantoin. See Glycoluric.
- English Word Hydantoin Definition A derivative of urea, C3H4N2O2, obtained from allantion, as a white, crystalline substance, with a sweetish taste; -- called also glycolyl urea.
- English Word Hydatid Definition 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 Coenurus. See these words in the Vocabulary.
- English Word Hydatiform Definition Resembling a hydatid.
- English Word Hydatoid Definition Resembling water; watery; aqueous; hyaloid.
- English Word Hydr- Definition See under Hydro-.
- English Word Hydr- Definition A combining form from Gr. /, /, water (see Hydra).
- English Word Hydr- Definition A combining form of hydrogen, indicating hydrogen as an ingredient, as hydrochloric; or a reduction product obtained by hydrogen, as hydroquinone.
- English Word Hydra Definition 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.