无脊椎 wújǐzhuī invertebrate 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脊椎 jǐzhuī noun backbone The series of vertebrae extending from the skull to the pelvis forming the main support of the body; the spine