n.尾骨...

The coccyx is a small bone at the base of the spine.尾骨是脊骨底部的一块小骨....

coccyx的音标：coccyx的英式发音音标为：['kɒksɪks]coccyx的美式发音音标为：['kɑksɪks]...

coccyx的复数形式为：coccyxes...