单细胞生物 dānxìbāoshēngwù single-celled organism Origin Definitions Defs Strokes Stroke Words Sentences Sents 单 單 dān adjective single single; individual; alone; separate细胞 細胞 xìbāo noun cell basic biological unit of all organisms; typically consisting of a nucleus, cytoplasm, and a membrane生物 shēngwù noun living thing organism; living creature; life form; includes animals, plants, and microbes