発条

(1)a metal elastic device that returns to its shape or position when pushed or pulled or pressed; "the spring was broken"

(2)押されたり引っ張られたり圧し縮められたときに元の形や場所に戻る金属製の装置

(3)the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism

(4)機械的装置（特に掛け時計や腕時計など）で最も重要なスプリング

(5)ほどけるとメカニズムが働く