rüˈdistə noun plural
Usage: capitalized
Etymology: New Latin, from Latin rudis rude, raw + -ista -ist
in some classifications : a division of Eulamellibranchia comprising extinct chiefly Cretaceous bivalve mollusks with one valve elongate, conical, and thick-shelled and the other small and fitting like a lid on the first
• ru·dis·tan (ˈ) ̷ ̷| ̷ ̷stən adjective or noun
• ru·dis·tid (ˈ) ̷ ̷| ̷ ̷stə̇d adjective or noun