n 1 a : the introducing of a solution (as of glucose or salt) esp. into a vein : also : the solution so used b (1) : the steeping or soaking usu. in water of a substance (as a plant drug) in order to extract its soluble constituents or principles - compare DECOCTION1 (2) : the liquid extract obtained by this process 2 : a watery suspension of decaying organic material <culturing soil amebas in lettuce > .
Similar sounding terms: in·va·sion
Published under license with Merriam-Webster, Incorporated. © 1997-2020.