Olfactory organ(Anat.), an organ for smelling. In vertebrates the olfactory organs are more or less complicated sacs, situated in the front part of the head and lined with epithelium innervated by the olfactory (or first cranial) nerves, and sensitive to odoriferous particles conveyed to it in the air or in water.

(Ol*fac"to*ry) n.; pl. Olfactories An olfactory organ; also, the sense of smell; — usually in the plural.

(Ol"i*ban) n. (Chem.) See Olibanum.

(O*lib"a*num) n. [LL., fr. Ar. al-luban frankincense; cf.Gr. of Semitic origin.] The fragrant gum resin of various species of Boswellia; Oriental frankincense.

1. A liquid oil made from animal fats (esp. beef fat) by separating the greater portion of the solid fat or stearin, by crystallization. It is mainly a mixture of olein and palmitin with some little stearin.

2. An artificial butter made by churning this oil with more or less milk.

Oleomargarine was wrongly so named, as it contains no margarin proper, but olein, palmitin, and stearin, a mixture of palmitin and stearin having formerly been called margarin by mistake.

(O`le*om`e*ter) n. [L. oleum oil + -meter.] (Chem.) An instrument for ascertaining the weight and purity of oil; an elaiometer.

(O"le*one) n. [L. oleum + - one, 1.] (Chem.) An oily liquid, obtained by distillation of calcium oleate, and probably consisting of the ketone of oleic acid.

(O`le*op"tene) n. [L. oleum oil + Cr. fleeting.] (Chem.) See Eleoptene. [R.]

(O`le*o*res"in) n. [L. oleum oil + E. resin.]

1. (Chem.) A natural mixture of a terebinthinate oil and a resin.

2. (Med.) A liquid or semiliquid preparation extracted (as from capsicum, cubebs, or ginger) by means of ether, and consisting of fixed or volatile oil holding resin in solution.

O`le*o*res"in*ous a.

(O"le*ose` O"le*ous) a. [L. oleosus, fr. oleum oil.] Oily. [R.] Ray. Floyer.

(O`le*os"i*ty) n. The state or quality of being oily or fat; fatness. [R.] B. Jonson.

(Ol`er*a"ceous) a. [L. oleraceus, from olus, oleris, garden or pot herbs, vegetables.] Pertaining to pot herbs; of the nature or having the qualities of herbs for cookery; esculent. Sir T. Browne.

(Olf) n. [Etymol. uncertain.] (Zoöl.) The European bullfinch. [Prov.Eng.]

(Ol*fac"tion) n. [See Olfactory.] (Physiol.) The sense by which the impressions made on the olfactory organs by the odorous particles in the atmosphere are perceived.

(Ol*fac"tive) a. See Olfactory, a.

(Ol*fac"tor) n. A smelling organ; a nose. [R.]

(Ol*fac"to*ry) a. [L. olfactus, p. p. of olfacere to smell; olere to have a smell + facere to make. See Odor, and Fact.] (Physiol.) Of, pertaining to, or connected with, the sense of smell; as, the olfactory nerves; the olfactory cells.

  By PanEris using Melati.

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