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A crystalline rock consisting of quarts and mica, common in the tin regions of Cornwall and Saxony.

upon the ground. -- Ground pearl (Zoöl.), an insect of the family Coccidæ (Margarodes formicarum), found in ants' nests in the Bahamas, and having a shelly covering. They are strung like beads, and made into necklaces by the natives. -- Ground pig (Zoöl.), a large, burrowing, African rodent (Aulacodus Swinderianus) a…

many of its properties it resembles caoutchouc, and it is extensively used for many economical purposes. The Mimusops globosa of Guiana also yields this material.

A New Zealand lizard, which, in anatomical character, differs widely from all other existing lizards. It is the only living representative of the order Rhynchocephala, of which many Mesozoic fossil species are known; -- called also Sphenodon, and Tuatera.

A hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood. Why does my blood thus muster to my heart! Shak.

and evaporation, and which, as manifested in fire, the sun's rays, mechanical action, chemical combination, etc., becomes directly known to us through the sense of feeling. In its nature heat is a mode if motion, being in general a form of molecular disturbance or vibration. It was formerly supposed to be a subtile, i…

the action of strong acetic acid and common salt; -- called also Teichmann's crystals. Chemically, it is a hydrochloride of hematin.

f, pertaining to, or taught by, Hermes Trismegistus; as, hermetic philosophy. Hence: Alchemical; chemic. "Delusions of the hermetic art." Burke. The alchemists, as the people were called who tried to make gold, considered themselves followers of Hermes, and often called themselves Hermetic philosophers. A. B. Buckley.…

In an hermetical manner; chemically. Boyle.

Unrelated in chemical composition, though similar or indentical in certain other respects; as, borax and augite are homoemorphous, but heteromerous.

up about them; as, a hill of corn or potatoes. [U. S.] Hill ant (Zoöl.), a common ant (Formica rufa), of Europe and America, which makes mounds or ant-hills over its nests. -- Hill myna (Zoöl.), one of several species of birds of India, of the genus Gracula, and allied to the starlings. They are easily taught to speak…

An alkaloid, prepared from atropine, and from other sources. It is chemically related to atropine, and is used for the same purpose.

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

the paraffin series. In an extended sense, the term is applied to the relation between chemical elements of the same group; as, chlorine, bromine, and iodine are said to be in homology with each other. Cf. Heterology. General homology (Biol.), the higher relation which a series of parts, or a single part, bears to the…

A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a stimulating effect; thus, according to Starling, the gastric glands are stimulated by a hormone from the pyloric mucous membrane.

ll and malevolence, or a desire to thwart and injure; occupied by an enemy or enemies; inimical; unfriendly; as, a hostile force; hostile intentions; a hostile country; hostile to a sudden change.

Pertaining or appropriate to a housewife; domestic; economical; prudent. A good sort of woman, ladylike and housewifely. Sir W. Scott.

Like a huswife; capable; economical; prudent. -- adv.

The act of becoming, or state of being, a hydrate. Water of hydration (Chem.), water chemically combined with some substance to form a hydrate; -- distinguished from water of crystallization.

n water. It is a typical acid, and is an indispensable agent in commercial and general chemical work. Called also muriatic, and chlorhydric, acid.