Entry 1 sense Webster, 1913 Apetalous /(ȧ*pĕt"al*ŭs)/ · A·pet·al·ous · IPA 01 a. Having no petals, or flower leaves. [See Illust. under Anther]. 1. Having no petals, or flower leaves. [See Illust. under Anther].(Bot.) See: Anther