cer·a·ti·tes \ˌserəˈtīd.ēz\noun Usage: capitalized Etymology: New Latin, from cerat- + -ites -ite : a genus (the type of the large family Ceratitidae) of Triassic ammonites having the septa with simple rounded saddles and finely denticulated lobes • cer·a·tit·ic\|serə|tid.ik\adjective • cer·a·ti·toid\ˌserəˈtīˌtȯid\adjective or noun