noun
Used almost exclusively in the set phrase 怒り心頭に発する (to become enraged, to fly into a rage). The standalone noun is rare and literary.
See also: 怒り心頭に発する
彼はその知らせを聞いて怒り心頭に発した。
He flew into a rage upon hearing the news.
Compound of 怒り (anger) and 心頭 (heart/mind). The exact historical derivation is uncertain; the phrase 怒り心頭に発する is a classical Chinese-derived expression.