Entry 1 sense Webster, 1913 Terebratulid · Ter·e·brat·u·lid · IPA /ˌtɛɹ.əˈbɹæ.tjə.lɪd/ 01 n. Any species of Terebratula or allied genera. Used also adjectively. 1. Any species of Terebratula or allied genera. Used also adjectively.(Zool.)