The Collaborative International Dictionary of English v.0.48:
Chinchillidae \Chinchillidae\ n. a natural family of small bushy-tailed South American burrowing rodents. Syn: family Chinchillidae. [WordNet 1.5]WordNet (r) 3.0 (2006):
Chinchillidae n 1: small bushy-tailed South American burrowing rodents [syn: Chinchillidae, family Chinchillidae]