膝ひざ車ぐるま

noun

kneecap

Refers to the patella, the small bone at the front of the knee. Synonymous with 膝頭 (ひざがしら).

See also: 膝頭

• 転ころんで膝ひざ車ぐるまを強つよく打うった。

  I fell and hit my kneecap hard.

noun

knee wheel (judo)

A judo technique where the attacker uses their knee as a fulcrum to throw the opponent. Domain-specific martial arts term.