troph·al·lax·is (tr?f??-l?k?s?s, tr??f?-)n. The transfer or exchange of regurgitated liquid food between individuals of certain social insects such as ants or bees.[troph(o)- + Greek allaxis, exchange (from allassein, to exchange, from allos, other; see al- in Indo-European roots).]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.trophallaxis (?tr?f??læks?s) n (Zoology) the exchange of regurgitated food that occurs between adults and larvae in colonies of social insects[C19/20: from New Latin, from tropho- + Greek allaxis exchange, from allassein to change, from allos other] ?trophal?lactic adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014troph?al?lax?is (?tr?f ??læk s?s, ?tro? f?-) n., pl. -lax?es (-?læk siz) the exchange of nutriments or other secretions between organisms, as the members of a colony of social insects. [1915?20; troph- + Greek állaxis exchange =allak-, variant s. of allássein to change + -sis -sis] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.