n. pl. mice (mīs)
a. Any of numerous small rodents of the families Muridae and Cricetidae, such as the house mouse, characteristically having a pointed snout, small rounded ears, and a long naked or almost hairless tail.
b. Any of various similar or related animals, such as the jumping mouse, the vole, or the jerboa.
2. A cowardly or timid person.
3. Informal A discolored swelling under the eye caused by a blow; a black eye.
4. pl. mice or mous·es (mousĭz) Computers A handheld, button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen, allowing the operator to move the indicator freely, as to select operations or manipulate text or graphics.
intr.v. (mouz, mous) moused, mous·ing, mous·esPhrasal Verb:
1. To hunt mice.
2. To search furtively for something; prowl.
To hold a computer pointer over (a particular object or area of a screen) so as to cause a pop-up box to appear or other change to occur.
[Middle English mous, from Old English mūs; see mūs- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.