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A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-.

A metallic mineral, a selenide of copper and silver; -- so called by Berzelius on account of its being found soon after the discovery of the metal selenium.

n uncrystallizable sirup by the decomposition of melitose; also obtained from a Tasmanian eucalyptus, -- whence its name.

A volatile, terpenelike oil extracted from the eucalyptus, and consisting largely of cymene.

A myrtaceous genus of trees, mostly Australian. Many of them grow to an immense height, one or two species exceeding the height even of the California Sequoia.

A genus of South American amaryllidaceous plants with large and beautiful white blossoms.

act of giving thanks; thanksgiving. [Obs.] Led through the vale of tears to the region of eucharist and hallelujahs. South.

Giving thanks; expressing thankfulness; rejoicing. [Obs.] The eucharistical part of our daily devotions. Ray.

One who resolves religion into prayer. [Obs.] Gauden.

Relating to, or consisting of, euchlorine; as, euchloric . Davy.

A yellow or greenish yellow gas, first prepared by Davy, evolved from potassium chlorate and hydrochloric acid. It is supposed to consist of chlorine tetroxide with some free chlorine.

A formulary of prayers; the book of offices in the Greek Church, containing the liturgy, sacraments, and forms of prayers.

Euchology. [R.]

nd called right bower, the lowest card used being the seven, or frequently, in two-handed euchre, the nine spot. See Bower.

Having a fine color. Euchroic acid (Chem.), an organic, imide acid, obtained as a colorless crystalline substance, C12H4N2O8 by heating an ammonium salt of mellitic acid. By reduction it is changed to a dark blue substance (euchrone), -- hence its name.

A mineral occurring in transparent emerald green crystals. It is hydrous arseniate of copper.

A substance obtained from euchroic acid. See Eychroic.

A good state of he blood and other fluids of the body.

A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina.

A Greek geometer of the 3d century