valvula spiralis

valvula spi·ra·lis | \ -ˌspīˈralə̇s , -rāl- ; spə̇ˈräl- \
plural valvulae spirales\-a(ˌ)lēz, -ā(ˌ)lēz, -ä(ˌ)lās \

Definition of valvula spiralis 

: a series of crescentic folds of mucous membrane somewhat spirally arranged on the interior of the gallbladder and continuing into the cystic duct

called also valve of Heister

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History and Etymology for valvula spiralis

New Latin, literally, spiral valvula

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