Fōam1, n.
n. [A-S. fām, O. & N. H. Ger. feim, Up. Ger. faum, M. H. Ger. veim, allied to Lat. spuma for pumu, Skr. phēna, Slav. pjena.] The aggregation of bubbles which is formed on the surface of liquors by fermentation or violent agitation; froth; spume.