Entry 1 sense Webster, 1913 Eozoönal /(ē`ō̇*zō"ŏn*al)/ · E·o·zo·ön·al · IPA 01 a. Pertaining to the eozoön; containing eozoöns; as, eozoönal limestone. 1. Pertaining to the eozoön; containing eozoöns; as, eozoönal limestone.(Paleon.)