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foamMain Entry: 1foam Pronunciation: \ˈfōm\ Function: noun Etymology: Middle English fome, from Old English fām; akin to Old High German feim foam, Latin spuma foam, pumex pumice Date: before 12th century 1 : a light frothy mass of fine bubbles formed in or on the surface of a liquid or from a liquid: as a : a frothy mass formed in salivating or sweating b : a stabilized froth produced chemically or mechanically and used especially in fighting oil fires c : a material in a lightweight cellular form resulting from introduction of gas bubbles during manufacture — foam·less \-ləs\ adjective
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