人ひと頭がしら

noun

skull; cranium

Refers to the bony structure of the head. Less common in everyday conversation than 頭蓋骨 (ずがいこつ), but used in medical or anatomical contexts.

• 人ひと頭がしらの構こう造ぞうを模も型けいで学まなぶ。

  Learn the structure of the skull using a model.

noun

kanji "person" radical at top

Refers to the kanji radical ⺅ (人) when it appears at the top of a character, as in 今 or 令. Used in discussions of kanji composition.

See also: 人屋根

• 「今いま」の上うえの部ぶ分ぶんは人ひと頭がしらと呼よばれる。

  The top part of '今' is called 人頭 (the 'person' radical at top).