resilium

noun

re·​sil·​i·​um

rə̇ˈzilēəm,

rēˈz-

plural resilia

-lēə

: the internal part of the hinge ligament of a bivalve shell resembling in consistency and often described as cartilage but being in fact chitinous

Word History

Etymology

New Latin, from Latin resilire to rebound

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