凹槽 āocáo groove Origin Definitions Defs Strokes Stroke Words Sentences Sents Showing: All meanings (2) All meanings 1 āocáo groove recess 1 sentence 木板上有一道用来固定的凹槽。 mùbǎn shàng yǒu yī dào yònglái gùdìng de āo cáo. There is a groove in the wooden board for fixing it in place. Source: Dong Chinese Dictionary