Noun racemic acid (uncountable) (organic chemistry) an equal mixture of the d- and l- forms of tartaric acid found in grape juice; the isomers can be separated via crystallization Translations an equal mixture of the d- and l- forms of tartaric acid found in grape juice; the isomers can be separated via crystallization Italian: acido racemico m Russian: виногра́дная кислота́ f (vinográdnaja kislotá), рацеми́ческая ви́нная кислота́ (racemíčeskaja vínnaja kislotá)