A needle, provided with a stylet, for entering the spinal canal or cisterna magna, with a bore of at least 1 mm and 40 mm or more in length. ... (05 Mar 2000) ... 
Type: Term Definitions: 1. a needle, provided with a stylet, for entering the spinal canal or cisterna magna, with a bore of at least 1 mm and 40 mm or more in length. Synonyms: spinal needle