依地酸二钴 yīdìsuān'èrgǔ kelocyanor Origin Definitions Defs Strokes Stroke Words Sentences Sents 依 yī phonetic 地 dì phonetic 酸 suān noun acid acid, a chemical compound that releases hydrogen ions in water二 èr numeral two the number two; 2钴 鈷 gǔ cobalt chemical element (symbol Co), a silver-white transition metal used in alloys and pigments (Taiwan pr. gū)