— trophallactic /trof'euh lak"tik, troh'feuh-/ , adj.
/trof'euh lak"sis, troh'feuh-/ , n. , pl. trophallaxes /-lak"seez/ .
(among social insects) the exchange of nutriments or other secretions between members of a colony.
[ 1915-20; TROPH- + Gk állaxis exchange, equiv. to allak- (verbid s. of allássein to change; see ALLO-) + -sis -SIS ]