The Collaborative International Dictionary of English v.0.48:
Callithrix \Callithrix\ n. the type genus of the Callithricidae; the true marmosets. Syn: genus Callithrix. [WordNet 1.5]WordNet (r) 3.0 (2006):
Callithrix n 1: type genus of the Callithricidae: true marmosets [syn: Callithrix, genus Callithrix]