大だい後こう頭とう孔こう

noun

foramen magnum

Anatomical term for the large opening at the base of the skull through which the spinal cord passes.

• 大だい後こう頭とう孔こうは頭ず蓋がい骨こつの底てい部ぶにある大おおきな穴あなです。

  The foramen magnum is a large opening at the base of the skull.