deer mouse noun2 •Any of the muroid rodents in the genus Peromyscus, especially Peromyscus maniculatus.In the wild, deer mice and oldfield mice never interbreed. — 2017 •Many of the muroid rodents with notable jumping capability within the subfamily Neotominae (family Cricetidae), including all species in the genera Peromyscus and Habromys, as well as some species in several others. formsdeer mice
