Any of various small, long-tailed, arboreal monkeys of the genera Leontideus and Saguinus of Central and South America, closely related to and resembling the marmosets but having a larger body, longer limbs, and lower canines that extend well beyond the incisors.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.