Rattus
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to Rattus: Rattus rattus
Rattus
(rat'ŭs),The rats, a genus of rodents, family Muridae. Rattus rattus, the black r., is the species most commonly responsible for transmitting plague to humans by means of the flea, Xenopsylla cheopis; it is smaller and darker than the Norwegian, sewer, or brown rat (Rattus norvegicus) and has longer ears and tail. See: rat.
Farlex Partner Medical Dictionary © Farlex 2012