noun
grey head; head with grey hair
Refers to a head of hair that has turned grey or white, typically with age. Often used in literary or descriptive contexts.
祖父は白頭になっても元気だ。
My grandfather is still energetic even though his hair has turned grey.
白髪 is the common word for grey/white hair, while 白頭 is a more formal or literary term for a head of grey hair.
Compound of 白 (white) and 頭 (head). The reading はくとう is the on'yomi of both characters.