丝茅 sīmáo cogongrass Definitions Defs Origin Strokes Stroke Words Sentences Sents 丝 絲 sī noun strand anything thin and long like a thread, such as wire, hair, or julienne strips of food茅 máo noun thatch A type of wild grass such as reeds, rushes, or cogongrass; often used as a building material for roofing or to make straw mats and raincoats.