metatartaric acidWiktionary 原文英美构词拆解meta-前缀+tartaric acid词干meta-(anatomy and zoology) Behind. [From 19th century] · (botany and zoology) Later or subsequent. [From 19th century]词源说明From meta- + tartaric acid.释义名词noun1(chemistry) a polymeric lactone of variable composition obtained by heating tartaric acid; used to prevent precipitation in wine