腰椎穿刺 yāozhuīchuāncì lumbar puncture Origin Definitions Defs Strokes Stroke Words Sentences Sents 腰椎 yāozhuī lumbar vertebra any of the five vertebrae of the lower back穿刺 chuāncì puncture to puncture a body cavity, organ, or vessel with a needle to extract fluid or tissue for diagnosis or treatment; to perform a biopsy