/mahr"meuh zet', -set'/ , n.
any of several small, squirrellike, South and Central American monkeys of the genera Callithrix, Leontocebus, etc., having soft fur and a long, nonprehensile tail: some species are endangered.
[ 1350-1400; ME marmusette a kind of monkey, an idol marmouset, appar. equiv. to marmos ( er ) to murmur ( marm- (see MARMOT) + -oser v. suffix) + -et -ET ]