pygmy marmoset

noun

: a South American marmoset (Callithrix pygmaeus) that is the smallest of all monkeys standing about two and one half inches high and weighing less than five ounces

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now