‖ OtomysZool.|ˈəʊtəmɪs| [f. oto- + Gr. µῦς mouse.] A genus of rodents of the family Muridæ, having large hairy ears. 1834McMurtrie Cuvier's Anim.Kingd. 86 The Otomys are nearly allied to the Field Rats.Ibid.(The Cape Otomys.) Size of a rat; fur marked with black and fawn-coloured rings.