mucilage

Etymology

From Middle English muscilage, mussillage, from Middle French mucilage (“viscous substance found in vegetable material”), from Late Latin mūcilāgō (“musty or moldy juice”). See Greek μούχλα (moúchla, “mold”), and related derivatives, for example mushroom, from *meus- (“mosses, mold, mildew”).

noun

1. A thick gluey substance (gum) produced by many plants and some microorganisms.
   Malt liquors […] are distinguished from wine, chiefly by the larger quantity of mucilage and saccharine matter […] 1821, Friedrich Accum, A Treatise on the Art of Brewing, London: Longman, Hurst, Rees, Orme, & Brown, page 5