ˌpālēˈästrə̇kə, ˌpal- also -ˈȯs- noun plural
Usage: capitalized
Etymology: New Latin, from pale- + -ostraca
in some classifications : a class of arthropods comprising the king crabs, the eurypterids, and sometimes the trilobites — compare merostomata
• palae·os·tra·can | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷kən adjective or noun