Entry 1 sense Webster, 1913 Epicranial · Ep·i·cra·ni·al · IPA /ˌɛp.ɪˈkɹeɪ.ni.əl/ 01 a. Pertaining to the epicranium; as, epicranial muscles. 1. Pertaining to the epicranium; as, epicranial muscles.(Anat.)