Entry 1 sense Webster, 1913 Lituite /(lĭt"u*ī̇t; 135)/ · Lit·u·ite · IPA 01 n. Any species of ammonites of the genus Lituites. They are found in the Cretaceous formation. 1. Any species of ammonites of the genus Lituites. They are found in the Cretaceous formation.(Paleon.)