noun, noun or participle which takes 'suru'
spasm; cramp; convulsive contraction
Medical term for involuntary muscle contraction. Often used in compound words like 胃攣縮 (stomach cramp) or 顔面攣縮 (facial spasm).
激しい運動の後、ふくらはぎが攣縮を起こした。
After intense exercise, my calf went into a spasm.
胃
My stomach cramped and a sharp pain ran through me.