Efficiency of a heat engine, the ratio of the work done by an engine, to the work due to the heat supplied to it.
Ef*fi"cient (-ent), a. [L. efficiens, -entis, p. pr. of efficere to effect: cf. F. efficient. See Effect, n.] Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.
The efficient cause is the working cause.
Wilson.
Syn. -- Effective; effectual; competent; able; capable; material; potent.
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Ef*fi"cient (?), n. An efficient cause; a prime mover.
God . . . moveth mere natural agents as an efficient only.
Hooker.
Ef*fi"cient*ly, adv. With effect; effectively.
Ef*fierce" (?), v. t. [Pref. ex- (intens.) + fierce.] To make fierce. [Obs.] Spenser.
Ef*fig"i*al (?), a. Relating to an effigy.
Ef*fig"i*ate (?), v. t. [L. effigiatus, p. p. of effigiare to form, fr. effigies. See Effigy.] To form as an effigy; hence, to fashion; to adapt.
[He must] effigiate and conform himself to those circumstances.
Jer. Taylor.
Ef*fig`i*a"tion (?), n. [Cf. LL. effigiatio.] The act of forming in resemblance; an effigy. Fuller.
||Ef*fig"i*es (?), n. [L.] See Effigy. Dryden.
Ef"fi*gy (?), n.; pl. Effigies (#). [L. effigies, fr. effingere to form, fashion; ex + fingere to form, shape, devise. See Feign.] The image, likeness, or representation of a person, whether a full figure, or a part; an imitative figure; -- commonly applied to sculptured likenesses, as those on monuments, or to those of the heads of princes on coins and medals, sometimes applied to portraits.
To burn, or To hang, in effigy, to burn or to hang an image or picture of a person, as a token of public odium.
Ef*flag"i*tate (?), v. t. [L. efflagitatus, p. p. of efflagitare.] To ask urgently. [Obs.] Cockeram.
Ef*flate" (?), v. t. [L. efflatus, p. p. of efflare to blow or breathe out; ex + flare to blow.] To fill with breath; to puff up. Sir T. Herbert.
Ef*fla"tion (?), n. The act of filling with wind; a breathing or puffing out; a puff, as of wind.
A soft efflation of celestial fire.
Parnell.
Ef`flo*resce" (?), v. i. [imp. & p. p. Effloresced (?); p. pr. & vb. n. Efflorescing (?).] [L. efflorescere to bloom, blossom; ex + florescere to begin to blossom, incho., fr. florere to blossom, fr. flos a flower. See Flower.] 1. To blossom forth. Carlyle.
2. (Chem.) To change on the surface, or throughout, to a whitish, mealy, or crystalline powder, from a gradual decomposition, esp. from the loss of water, on simple exposure to the air; as, Glauber's salts, and many others, effloresce.
3. To become covered with a whitish crust or light crystallization, from a slow chemical change between some of the ingredients of the matter covered and an acid proceeding commonly from an external source; as, the walls of limestone caverns sometimes effloresce with nitrate of calcium in consequence of the action in consequence of nitric acid formed in the atmosphere.
Ef`flo*res"cence (?), n. [F. efflorescence.] 1. (Bot.) Flowering, or state of flowering; the blooming of flowers; blowth.
2. (Med.) A redness of the skin; eruption, as in rash, measles, smallpox, scarlatina, etc.
3. (Chem.) (a) The formation of the whitish powder or crust on the surface of efflorescing bodies, as salts, etc. (b) The powder or crust thus formed.
Ef`flo*res"cen*cy (?), n. The state or quality of being efflorescent; efflorescence.
Ef`flo*res"cent (?), a. [F. efflorescent, L. efflorescens, -entis, blooming, p. pr. of efflorescere. See Effloresce, v. i.] 1. That effloresces, or is liable to effloresce on exposure; as, an efflorescent salt.