(biology) In birds, a skin projection covered in feathers appearing on the sides of the head, near the ears.
日本語の意味
（生物学）鳥類において、耳の近くで頭部の側面に見られる、羽毛で覆われた皮膚の突起部
英語の意味
(biology) In birds, a skin projection covered in feathers appearing on the sides of the head, near the ears.
