| a. | 1. | (Chem.) Of or pertaining to tartar; derived from, or resembling, tartar.| Tartaric acid | | (a) An acid widely diffused throughout the vegetable kingdom, as in grapes, mountain-ash berries, etc., and obtained from tartar as a white crystalline substance, C2H2(OH)2.(CO2H)2, having a strong pure acid taste. It is used in medicine, in dyeing, calico printing, photography, etc., and also as a substitute for lemon juice. Called also dextro-tartaric acid. | | b - | By extension, any one of the series of isomeric acids (racemic acid, levotartaric acid, inactive tartaric acid) of which tartaric acid proper is the type. |
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