環かん椎つい

noun

atlas (vertebra)

Anatomical term for the first cervical vertebra, which supports the skull. Used in medical and biological contexts.

• 環かん椎ついは頭ず蓋がい骨こつを支ささえる最さい初しょの頸けい椎ついです。

  The atlas is the first cervical vertebra that supports the skull.