(computing) A mouse (pointing device) that uses a light source and a light detector (for example, an LED and an array of photodiodes) to detect movement, as opposed to the earlier mechanical mouse.

(computing) A pointing device which uses a ball to detect movement.

(archaic) myopia

Alternative form of mouse deer

plural of mouse-deer

(firearms, colloquial) A pocket pistol, especially one of a particularly small caliber.

plural of mouse gun

Any of the species of the genus Sicista, found in Eurasian forests and steppes.

rice rat

(medicine) A loose body, such as a bone fragment, inside a joint of the body.