fluc·tu·a·tion
n 1 : a motion like that of waves : esp : the wavelike motion of a fluid collected in a natural or artificial cavity of the body observed by palpation or percussion 2 a : a slight and nonheritable variation : esp : such a variation occurring in response to environmental factors b : recurrent and often more or less cyclic alteration (as of form, size, or color of a bodily part) fluc*tu*ate vb -at*ed -at*ing
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