noun
Refers to the fleshy red crest on a rooster's head. Also used figuratively in the idiom トサカにくる (to get angry).
雄鶏のトサカは朝日を受けて真っ赤に輝いていた。
The rooster's comb shone bright red in the morning sun.
彼はいつもトサカにきている
He always looks like he's fuming mad.
Kanji form; can also be read けいかん. Rare in modern usage.
Hiragana spelling, also common.
鶏 is the general word for chicken, while トサカ specifically refers to the comb on a rooster's head.
The origin is uncertain. The kanji 鶏冠 literally means 'chicken crown'.