Ma'anar ƙamus na "lambar atomic 103" ita ce kamar haka:Lambar atomic 103 tana nufin adadin protons da aka samu a cikin tsakiya na atom na sinadarai lawrencium (Lr). Wani sinadari ne na rediyo da kuma roba wanda aka fara haɗa shi a cikin 1961 ta ƙungiyar masana kimiyya karkashin jagorancin Albert Ghiorso a Laboratory National Lawrence Berkeley a California, Amurka. Ana amfani da lambar atomic 103 don keɓance nau'in lawrencium a cikin tebur na abubuwan lokaci-lokaci.