From The Collaborative International Dictionary of English v.0.44 [gcide]:
1. The act of flowing or pouring back by the orifice of entrance; specifically (Med.), the reversal of the natural direction in which the current or contents flow through a tube or cavity of the body. --Quain.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
52 Moby Thesaurus words for "regurgitation": Charybdis, Maelstrom, back stream, backflow, backwash, backwater, barf, countercurrent, counterflow, counterflux, disgorgement, doubling, duplication, echo, eddy, egesta, egestion, gagging, gulf, gurge, heaves, heaving, imitation, maelstrom, nausea, plagiarism, puke, quotation, reappearance, rebirth, recurrence, redoubling, reduplication, reecho, refluence, reflux, reincarnation, renewal, reoccurrence, repetition, reproduction, resumption, return, spew, swirl, twirl, vomit, vomiting, vomition, vortex, whirl, whirlpool
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