despumate
verb
(tr) to clarify or purify (a liquid) by skimming a scum from its surface
(intr) (of a liquid) to form a scum or froth
Word Origin for despumate
C17: from Latin dēspūmāre to skim off, from de- + spūma foam, froth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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