无管腺 wúguǎnxiàn endocrine gland Origin Definitions Defs Strokes Stroke Words Sentences Sents 无 無 wú adjectiveverb to not have to not have; there is no; lack; (as prefix) non-; un-; -less管 guǎn noun tube tube; pipe; cylinder; any long, hollow cylindrical object腺 xiàn noun gland gland; organ or group of cells that produces and secretes chemical substances