資料來源 : pyDict

偶價元素或原子團

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Artiad \Ar"ti*ad\, a. [Gr. ? even, fr. ? exactly.] (Chem.)
   Even; not odd; -- said of elementary substances and of
   radicals the valence of which is divisible by two without a
   remainder.