Part 850

Eu*chlo"ric (?), a. [Gr. e'y`chlwro`s fresh and green; e'y^ well + chlwro`s pale green.] (Chem.) Relating to, or consisting of, euchlorine; as, euchloric gas. Davy.

Eu*chlo"rine (?), n. [Cf. F. euchlorine. See Euchloric.] (Chem.) 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.

{ ||Eu`cho*lo"gi*on (?), Eu*chol"o*gy (?), } n. [NL. euchologion, Gr. &?; prayer book; &?; prayer, vow (fr. &?; to pray) + &?; to say, speak.] (Eccl.) A formulary of prayers; the book of offices in the Greek Church, containing the liturgy, sacraments, and forms of prayers.

Eu"cho*logue, n. [F. euchologe.] Euchology. [R.]

Eu"chre (?), n. [Perh. from F. écarté.] A game at cards, that may be played by two, three, or four persons, the highest card (except when an extra card called the Joker is used) being the knave of the same suit as the trump, and called right bower, the lowest card used being the seven, or frequently, in two-handed euchre, the nine spot. See Bower.

Eu"chre, v. t. 1. To defeat, in a game of euchre, the side that named the trump.

2. To defeat or foil thoroughly in any scheme. [Slang.]

Eu*chro"ic (?), a. [Gr. &?; well- colored; &?; well + &?; color.] (Chem.) 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.

Eu"chro*ite (?), n. [See Euchroic.] (Min.) A mineral occurring in transparent emerald green crystals. It is hydrous arseniate of copper.

Eu"chrone (?) n. (Chem.) A substance obtained from euchroic acid. See Eychroic.

Eu"chy*my (?), n. [Gr. &?; well + &?; juice liquid. See Chyme.] (Med.) A good state of the blood and other fluids of the body.

Eu"clase (?) n. [Gr. &?; well, easily + &?; to break. Cf. F. euclase, G. euklas. See named from its brittleness.] (Min.) A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina.

Eu"clid (?), n. A Greek geometer of the 3d century b. c.; also, his treatise on geometry, and hence, the principles of geometry, in general.

Eu*clid"i*an (?), n. Related to Euclid, or to the geometry of Euclid.

Euclidian space (Geom.), the kind of space to which the axioms and definitions of Euclid, relative to straight lines and parallel lines, apply; -- called also flat space, and homaloidal space.

||Eu`co*pep"o*da (?), n. pl. [NL. See Eu- and Copepoda.] (Zoöl.) A group which includes the typical copepods and the lerneans.

Eu"cra*sy (?). [Gr. &?;; &?;, well-tempered; e'y^ well + &?; to mix, temper: cf. F. eucrasie.] (Med.) Such a due mixture of qualities in bodies as constitutes health or soundness. Quincy.

Euc"tic*al (?) [Gr. &?;, fr. &?; to pray, wish.] Expecting a wish; supplicatory. [R.]

Sacrifices . . . distinguished into expiatory, euctical, and eucharistical.

Bp. Law.

{ Eu*de"mon, Eu*dæ"mon (?) }, n. [Gr. e'y^ well, good + &?; one's demon.] A good angel. Southey.

{ Eu`de*mon"ics, Eu`dæ*mon"ics (?) }, n. [Gr. &?; conducive to happiness. See Eudemonism.] That part of moral philosophy which treats of happiness; the science of happiness; -- contrasted with aretaics. J. Grote.

{ Eu*de"mon*ism, Eu*dæ"mon*ism (?) }, n. [Gr. &?; a thinking happy, fr, &?; blessed with a good genius, happy; e'y^ well, good + &?; one's demon of genius. See Demon.] That system of ethics which defines and enforces moral obligation by its relation to happiness or personal well-being.

{ Eu*de"mon*ist, Eu*dæ"mon*ist }, n. One who believes in eudemonism.

I am too much of a eudæmonist; I hanker too much after a state of happiness both for myself and others.

De Quincey.

{ Eu*de`mon*is"tic , Eu*dæ`mon*is"tic (?) }, a. Of or pertaining to eudemonism.