Entry 1 sense Webster, 1913 Tetravalent /tĕtˌ-rəv-āl'-ənt/ · Te·trav·a·lent · IPA /tˌɛtrəvˈeɪlənt/ 01 a. Having a valence of four; tetratomic; quadrivalent. 1. Having a valence of four; tetratomic; quadrivalent.(Chem.)