Entry 1 sense Webster, 1913 Receptaculum /(rĕs`ĕp*tăk"ū̇*lŭm)/ · Rec·ep·tac·u·lum · IPA 01 n. A receptacle; as, the receptaculum of the chyle. pl. Receptacula ((rĕs`ĕp*tăk"ū̇*lȧ)) 1. A receptacle; as, the receptaculum of the chyle.(Anat.)