転てん筋きん

noun

calf cramp; charley horse

Medical term for a sudden, painful muscle cramp in the calf. The common colloquial term is こむら返り.

See also: こむら返り

• 夜よ中なかに転てん筋きんが起おきて飛とび起おきた。

  I woke up with a start when I got a calf cramp in the middle of the night.

• 運うん動どう不ぶ足そくだと転てん筋きんを起おこしやすい。

  If you don't exercise enough, you're prone to getting calf cramps.