mouse
/mous/
noun
  1. 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.
  2. Any of various similar or related animals, such as the jumping mouse, the vole, or the jerboa.
  3. A cowardly or timid person.
from The American Heritage® Dictionary of the English Language, 5th Edition. More at Wordnik
Google Ngrams shows both forms are used but "mice" is much more common. https://books.google.com/ngrams/graph?content=computer+mice%2Ccomputer+mouses&year_start=1970&year_end=2019&corpus=26&smoothing=3# Answer from PrettyDecentSort on reddit.com
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Scribbr
scribbr.com › home › what is the plural of mouse? | definition & examples
What Is the Plural of Mouse? | Definition & Examples
October 10, 2024 - The plural of mouse is mice, pronounced . Mice is an irregular plural noun that doesn’t follow regular pluralization rules, which simply add “-s” or “-es”
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Cambridge Dictionary
dictionary.cambridge.org › dictionary › english › mouse
MOUSE | English meaning - Cambridge Dictionary
mouse · noun · uk · Your browser doesn't support HTML5 audio · /maʊs/ us · Your browser doesn't support HTML5 audio · /maʊs/ plural mice uk/maɪs/ us/maɪs/ Add to word list Add to word list · A2 [ C ] a small mammal with short fur, a pointed face, and a long tail: pet mouse I had a pet mouse when I was a child.
People also ask

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Sheep is both singular and plural. Sheep is an irregular plural noun called a zero plural, which is where the word remains the same whether it’s the singular or plural form. · Scribbr’s free Grammar Checker will ensure you’re using the plural of sheep correctly.
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scribbr.com › home › is “mouses” or “mices” correct?
Is “mouses” or “mices” correct?
Is “dice” plural or singular?
Dice is the plural form of the word die, which is singular. Some people wonder what the plural of dice is without realizing that “dice” is, in fact, already the plural of “die,” which is singular. · “Dice” is an irregular plural noun that doesn’t follow regular pluralization rules of simply adding “-s” or “-es” to the end of the singular form, which is why “dies” and “dices” are incorrect. · Use Scribbr’s free Grammar Checker to ensure you always use the correct form in your writing.
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scribbr.com
scribbr.com › home › is “mouses” or “mices” correct?
Is “mouses” or “mices” correct?
What is a zero plural?
A zero plural is a type of irregular plural noun that stays the same whether you refer to the singular or plural (e.g., sheep/sheep and aircraft/aircraft). · Scribbr’s free Grammar Checker will ensure you’re using the correct singular or plural form in all of your online documents.
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scribbr.com › home › is “mouses” or “mices” correct?
Is “mouses” or “mices” correct?
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Merriam-Webster
merriam-webster.com › dictionary › mouse
MOUSE Definition & Meaning - Merriam-Webster
plural also mouses : a small mobile manual device that controls movement of the cursor and selection of functions on a computer display
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Vocabulary.com
vocabulary.com › dictionary › mouse
Mouse - Definition, Meaning & Synonyms | Vocabulary.com
In computer terms, a mouse is a corded or wireless device that moves your computer's cursor while you move the mouse. In most cases, the plural of mouse is "mice," but more than one computer mouse can also be called "mouses."
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Reddit
reddit.com › r/grammar › is the plural of "mouse" still "mice" when referring to the computer peripheral?
r/grammar on Reddit: Is the plural of "mouse" still "mice" when referring to the computer peripheral?
August 5, 2020 - The plural of this word, in reference to small rodents, is (of course) mice. In reference to computer gadgets, usage has changed rapidly. Many usagists in the late 1990s recommended mouses over mice (on the analogy of louse, which forms louses ...
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Nottingham
blogs.nottingham.edu.my › learningenglish › 2014 › 08 › 01 › what-is-the-plural-of-computer-mouse
What is the plural of ‘computer mouse’? – Learning English
My contention is that the thing connecting the computer mouse to the conceptual mouse in our minds is the physical resemblance, in other words the shape of the mouse with the cable. Therefore, a mouse with a cord has enough “mouse-ness” to carry the irregular plural.
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Scribbr
scribbr.com › home › is “mouses” or “mices” correct?
Is “mouses” or “mices” correct?
October 10, 2024 - Mouses is incorrect in the context of hairy rodents regardless of the number of mice. Mices is not a word and is incorrect in every context. Scribbr’s free Grammar Checker ensures you use the correct plural forms of words.
Top answer
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There is no "logic" to it. English has irregular nouns. You must remember the nouns that have this kind of plural. Fortunately it is a short list:

man-men, foot-feet, tooth-teeth, goose-geese, louse-lice, mouse-mice, and woman-women


Now you could ask why these nouns are irregular. The reason is different patterns of mutation and regularisation.

There is a pattern called "i-mutation. A back vowel like [u] tends to be raised towards [i] when followed by a raised vowel. Listen carefully to the the sound in "doing" (when spoken naturally and quickly). The word "doing" becomes pronunced as something like [diwin]. The [i] of "ing" causes the [u] to become raised.

A similar thing happened to Old English "mus" = "mouse". The plural /musiz/ became /misiz/. Then vowel changes took /mus/ to /maus/ and /misiz/ to /maisiz/. The plural ending wasn't needed and lazy speakers dropped the /-iz/ to make the plural /mais/ (which was spelled mice). You can read more about i-mutation

House, on the other hand underwent regularisation. Instead of the plural evolving towards an irregular form, it changed to the regular. There is no particular logic to why "house" was regularised, but "mouse" was mutated. However "house" resisted the change to /haisiz/ and took the regular plural. The tendency for irregular forms to become regular opposes the tendency of words to mutate. This tension gives rise to illogical pairs like "mice"/"houses".

The use of computer mouses is another example of regularisation. With the change in meaning comes "permission" (from the gods of grammar) to reconsider the plural and regularise the grammar. Some people have taken this opportunity. But most don't and the common plural of "computer mouse" is still "computer mice".

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Grammar Monster
grammar-monster.com › plurals › plural_of_mouse.htm
The Plural of Mouse
What is the plural of mouse? The plural of mouse is mice. The plural of computer mouse is computer mouses or computer mice, but computer mice is far more popular.
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Quora
quora.com › What-is-the-plural-of-the-mouse-if-it-means-the-pointing-tool-attached-to-a-computer-but-not-the-animal
What is the plural of the 'mouse' if it means the pointing tool attached to a computer, but not the animal? - Quora
Back when the mouse first appeared for me — and that’s in the 1970s because I was in publishing — both “mouses” and “mice” were equally correct plurals for the computer mouse.
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Wikipedia
en.wikipedia.org › wiki › Computer_mouse
Computer mouse - Wikipedia
6 days ago - A computer mouse (plural mice; also mouses) is a hand-held pointing device that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of the pointer (called a cursor) on a display, which allows ...
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Abralin
cadernos.abralin.org › index.php › cadernos › article › view › 303
‘What is the plural of mouse?’ and other unhelpful questions for morphologists | Cadernos de Linguística
February 7, 2021 - Virtually any grammar of English will provide the information that mouse is one of a small number of nouns in English whose plural is formed by a historical process of umlaut, and that its plural form is mice.
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Pain in the English
painintheenglish.com › case › 534
Computer mouses or computer mice?
It's built-in, in the form of a touch pad, but is still referred to as a mouse in the manual; secondly, if you go to CompUSA and ask for "peripherals," you'll get directed to not only mice (as I'll refer to them because it's how I always have, and people know what I've meant), but speakers, printers, external hard drives, and anything else that can plug in to your computer. As far as what to call them "officially," I say, if the guy who invented the thing named it after the furry critter, and the plural form of said critter is "mice," then the plural form of the device is "mice" as well.
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Medium
medium.com › @adecressac › computer-mouses-or-computer-mice-df2dd5a89e06
Computer Mouses or Computer Mice? | by Antoine Decressac (#LinguisticallyYours) | Medium
December 11, 2024 - Words like "cat" become "cats," while words like "box" become "boxes." However, "mouse" belongs to a small group of irregular nouns that pluralise through a vowel change (known as umlaut).
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Quick and Dirty Tips
quickanddirtytips.com › home › what is the plural of ‘mouse’?
What Is the Plural of 'Mouse'?
February 21, 2024 - Years ago, people who had a computer mouse in each hand could call them “mouses” or “mice.” The "mice" plural comes from a linguistic process called "umlaut."
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Oxford Learner's Dictionaries
oxfordlearnersdictionaries.com › definition › english › mouse_1
mouse noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com
The mouse genome is a great resource for medical research. see also dormouse, field mouseTopics Animalsa1 ... Find the answers with Practical English Usage online, your indispensable guide to problems in English. (plural mice or mouses) (computing) a small device that is moved by hand across ...
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Scribbr
scribbr.com › home › what is the plural of computer mouse?
What is the plural of computer mouse?
October 10, 2024 - Both “mice” and “mouses” are acceptable plural forms of “mouse” in the context of the computer accessory.
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Scribbr
scribbr.com › home › is it “mices” or “mice”?
Is it “mices” or “mice”?
October 10, 2024 - Mouses is incorrect in the context of hairy rodents regardless of the number of mice. Mices is not a word and is incorrect in every context. Scribbr’s free Grammar Checker ensures you use the correct plural forms of words.