Kalmar "Bohr" yawanci tana nufin Niels Bohr, masanin kimiyyar lissafi dan kasar Denmark wanda ya ba da gudummawar tushe ga ci gaban ka'idar atomic da injiniyoyi. Bohr ya fi saninsa da ƙirar zarra, wanda ya nuna cewa electrons suna motsawa a cikin takamaiman matakan makamashi a kusa da tsakiya na atom. Ayyukansa sun taimaka wajen bayyana tsarin tebur na lokaci-lokaci da kuma halayen atom a cikin halayen sunadarai. Gabaɗaya amfani, ana iya amfani da kalmar "Bohr" don yin nuni ga wasu abubuwa masu alaƙa da Niels Bohr, kamar samfurin Bohr na zarra ko radius Bohr (naúrar ma'auni a cikin ilimin kimiyyar atomic).