Oxalic acid(Chem.), a dibasic acid, existing combined in oxalis as an acid potassium oxalate, and in many plant tissues as the calcium oxalate. It is prepared on a large scale, by the action of fused caustic soda or potash on sawdust, as a white crystalline substance, which has a strong acid taste, and is poisonous in large doses. It is used in dyeing, calico printing, bleaching flax and straw, the preparation of formic acid, and in salts of lemon for removing ink stains, mold, etc.

(Ox"a*line) n. [Glyoxal + - ine.] (Chem.) See Glyoxaline.

(Ox"a*lis) n. [L., a kind of sorrel, Gr. fr. sharp, pungent, acid.] (Bot.) A genus of plants, mostly herbs, with acid-tasting trifoliolate or multifoliolate leaves; — called also wood sorrel.

(Ox"a*lite) n. (Min.) A yellow mineral consisting of oxalate of iron.

(Ox`a*lur*am"ide) n. [Oxaluric + amide.] (Chem.) Same as Oxalan.

(Ox`a*lur"ate) n. (Chem.) A salt of oxaluric acid.

(Ox`a*lur"ic) a. [Oxalyl + urea.] (Chem.) Pertaining to, or designating, a complex nitrogenous acid related to the ureids, and obtained from parabanic acid as a white silky crystalline substance.

(Ox"a*lyl) n. [Oxalic + - yl.] (Chem.) (a) A hydrocarbon radical (C2O2) regarded as a residue of oxalic acid and occurring in derivatives of it. (b) An old name for carbonyl. (c) An old name for carboxyl.

(Ox*am"ate) n. (Chem.) A salt of oxamic acid.

(Ox`a*meth"ane) n. [Oxamic + ethyl.] (Chem.) Ethyl oxamate, obtained as a white scaly crystalline powder.

(Ox`a*meth"yl*ane) n. [Oxamic + methyl.] (Chem.) Methyl oxamate, obtained as a pearly white crystalline substance.

(Ox*am"ic) a. [Oxalic + amido] (Chem.) Pertaining to, or designating, an acid NH2.C2O2.HO obtained as a fine crystalline powder, intermediate between oxalic acid and oxamide. Its ammonium salt is obtained by boiling oxamide with ammonia.

Oxacid to OxYhæmacyanin

(Ox`ac"id) n. (Chem.) See Oxyacid.

(Ox"a*lan) n. [From Alloxan, by transposition of letters.] (Chem.) A complex nitrogenous substance C3N3H5O3 obtained from alloxan as a stable white crystalline powder; — called also oxaluramide.

(Ox`a*lan"tin) n. [From Alloxantin, by transposition of letters.] (Chem.) A white crystalline nitrogenous substance (C6H4N4O5) obtained by the reduction of parabanic acid; — called also leucoturic acid.

(Ox"a*late) n. [Cf. F. oxalate. See Oxalic.] (Chem.) A salt of oxalic acid.

(Ox*al"de*hyde) n. [Oxalic + aldehyde.] (Chem.) Same as Glyoxal.

(Ox`al*eth"yl*ine) n. [Oxalic + ethyl + -ine.] A poisonous nitrogenous base (C6H10N2) obtained indirectly from oxamide as a thick transparent oil which has a strong narcotic odor, and a physiological action resembling that of atropine. It is probably related to pyridine.

(Ox*al"ic) a. [From Oxalis: cf. F. oxalique.] (Chem.) Pertaining to, derived from, or contained in, sorrel, or oxalis; specifically, designating an acid found in, and characteristic of, oxalis, and also certain plant of the Buckwheat family.

  By PanEris using Melati.

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