I. tə̇.|traktə|nelə̇d adjective
also te·trac·ti·nel·li·dan -lədən
Etymology: tetractinellid from New Latin Tetractinellida; tetractinellidan from New Latin Tetractinellida + English -an
: of or relating to the Tetractinellida
II. noun
( -s )
: a sponge of the subclass Tetractinellida