They are all rodents. Usually, the two are distinguished by their size, and the Rat is larger than the Mouse. Biologically speaking, these are two different animals, mouse refers to mice and rat refers to rats. \x0d\\x0d\ explanation: \x0d\mouse English [ma? S] beauty [ma? S] \ x0d \ n. Mouse; Rats; A shy [timid] person; [Informal] Eye bruising; \x0d\vi. Catch rats; Spy, secretly look for; \x0d\[ Example] It's sacat-and-mouse gametohim, Andi 'mthemouse. \ x0d \ In his view, this is a cat-and-mouse trick, and I am a mouse. \ x0d \ x0d \ rat English [r? T] beauty [r? T] \ x0d \ n. Rat; Rat-like animals; Rat, despicable person; \x0d\vi. Catch rats; Betrayal, informer; \x0d\[ Example] Thiswasdemonstrational laboratoryxperimentwithrats. \ x0d \ Experiments with mice in the laboratory proved this point.