Any of various New World mice of the genera Phyllotis, Graomys, and Peromyscus (now placed in the family Cricetidae), characterized by large pinnae (external ears).
Origin
Early 20th century.
Definition of leaf-eared mouse in US English:
leaf-eared mouse
noun
Any of various New World mice of the genera Phyllotis, Graomys, and Peromyscus (now placed in the family Cricetidae), characterized by large pinnae (external ears).