troph·al·lax·is 
(trŏf′ə-lăksĭs, trō′fə-)
(trŏf′ə-lăksĭs, trō′fə-)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-1 in the Appendix of Indo-European roots).]
- imperceptible
- imperceptibleness
- imperceptibly
- imperceptive
- imperceptiveness
- imperceptivity
- impercipient
- imperfect
- imperfect fungus
- imperfection
- imperfective
- imperfectly
- imperfectness
- imperforate
- imperia
- imperial
- imperialism
- imperialist
- imperialistic
- imperialistically
- imperially
- imperial moth
- Imperial Valley
- imperil
- imperilment