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Having the two ends modified with unlike planes; -- said of a crystal.

A substance, in the form of reddish brown, microscopic, prismatic crystals, formed from dried blood by the action of strong acetic acid and common salt; -- called also Teichmann's crystals. Chemically, it is a hydrochloride of hematin.

Half turned round; half inverted; (Crystallog.) having a twinned structure.

Twin composition in crystals.

n arterial blood, it is always combined with oxygen, and is then called oxyhemoglobin. It crystallizes under different forms from different animals, and when crystallized, is called hæmatocrystallin. See Blood crystal, under Blood.

Any plant, usually procumbent and mosslike, of the cryptogamous class Hepaticæ; -- called also scale moss and liverwort. See Hepaticæ, in the Supplement.

The sulphate of iodoquinine, a substance crystallizing in thin plates remarkable for their effects in polarizing light.

A rare fluophosphate of glucina, in small white crystals.

A white, crystalline substance having a sweetish taste, obtained by the decomposition of hesperidin, and regarded as a complex derivative of caffeic acid.

A glucoside found in ripe and unripe fruit (as the orange), and extracted as a white crystalline substance.

Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.

Having six sides and six angles; six-sided. Hexagonal system. (Crystal.) See under Crystallization.

A cry to set dogs on. Shak.

Obtained from the urine of horses; as, hippuric acid. Hippuric acid, a white crystalline substance, containing nitrogen, present in the urine of herbivorous animals, and in small quantity in human urine. By the action of acids, it is decomposed into benzoic acid and glycocoll.

harsh, rough, grating voice or sound, as when affected with a cold; making a rough, harsh cry or sound; as, the hoarse raven. The hoarse resounding shore. Dryden.

Ho there; stop; attend; hence, a loud cry or a call to attract attention; a halloo. And every day, for food or play, Came to the mariner's hollo. Coleridge.

A near similarity of crystalline forms between unlike chemical compounds. See Isomorphism.

The cry of a wild goose. -- Honk"ing, n.

To utter a loud cry, or a sound imitative of the word, by way of call or pursuit; to shout. [Usually written whoop.]

To cry out or shout in contempt. Matrons and girls shall hoot at thee no more. Dryden.