翮かく

noun

quill; calamus

Ornithological term for the hollow shaft of a feather. Rare in everyday language; mainly encountered in scientific or literary descriptions of birds.

• 鳥とりの羽はねの翮かくは中ちゅう空くうで軽かるい。

  The quill of a bird's feather is hollow and light.

• この標ひょう本ほんでは翮かくの構こう造ぞうがよく保ほ存ぞんされている。

  In this specimen, the structure of the calamus is well preserved.