微び細さい構こう造ぞう定てい数すうびさいこうぞうていすうMeanings1nounfine-structure constant; Sommerfeld constantphysics›A fundamental physical constant, approximately 1/137, characterizing the strength of electromagnetic interaction. Used in quantum electrodynamics.微び細さい構こう造ぞう定てい数すうは約
