羽う枝し

noun

barb; ramus (of a feather)

Ornithological term for the slender branches extending from the rachis of a feather.

• 鳥とりの羽は根ねの羽う枝しは、顕けん微び鏡きょうで見みると細こまかい枝えだ分わかれをしている。

  Under a microscope, the barbs of a bird's feather show fine branching.

noun

pinnule (of a feather)

Zoological term for the secondary branches on a feather barb; less common than the general 'barb' sense.

• 羽う枝しのさらに細こまかい枝えだを小しょう羽う枝しと呼よぶ。

  The even finer branches of a barb are called barbules (小羽枝).