Entry 1 sense Webster, 1913 Alopecia /(ăl`ō̇*pē"shĭ*ȧ)/ · Al·o·pe·ci·a · IPA /æloʊˈpiː.ʃ(i)ə/ 01 n. Loss of the hair; baldness. 1. Loss of the hair; baldness.(Med.)