n. [ F. molasse, prob. fr. mollasse flabby, flimsy, fr. L. mollis soft. ] (Geol.) A soft Tertiary sandstone; -- applied to a rock occurring in Switzerland. See Chart of Geology. [ 1913 Webster ]
n. [ F. mélasse, cf. Sp. melaza, Pg. melaço, fr. L. mellaceus honeylike, honey-sweet, mel, mellis, honey. See Mellifluous, and cf. Melasses. ] The thick, brown or dark colored, viscid, uncrystallizable sirup which drains from sugar, in the process of manufacture; any thick, viscid, sweet sirup made from vegetable juice or sap, as of the sorghum or maple. See Treacle. [ 1913 Webster ]