スペクトル系けい列れつスペクトルけいれつMeanings1nounspectral seriesTechnical term in physics for a set of spectral lines produced by electron transitions in atoms, such as the Balmer series.水すい素そ原げん子しのスペクトル系けい列れつは、バルマー系けい列れつなどがよく知しら