What’s the Plural of Mouse: Understanding Singular and Plural Nouns

  • The plural form of ‘mouse’ when referring to the rodent is ‘mice’.
  • Both ‘mice’ and ‘mouses’ are acceptable, with ‘mice’ being more common.
  • The pluralization of ‘mouse’ reflects the adaptability of English grammar rules in response to technological terms.

When considering the modern invention of the computer mouse, both ‘mice’ and ‘mouses’ are technically acceptable plurals. ‘Mice’ remains the more commonly accepted and frequently used term, particularly in formal writing and speech, though ‘mouses’ can occasionally be found in discussions specifically about the computer device. Grammatical rules are sometimes adapted when technological innovations introduce new words or meanings, which is reflected in the pluralization debate surrounding the computer mouse.

What’s the Plural of “Mouse”?

In reference to the small, typically furry rodent with a pointed snout and long, slender tail, the plural form is “mice”. This transformation of the vowel from “ou” to “i” in the plural form is an example of a linguistic pattern known as vowel gradation or ablaut.

Computer Devicemice or mouses
  • The word “mice” echoes the traditional form.
  • “Mouses” can be used for clarity in tech-related discussions.

Origin of the Word “Mouse” (& the I-Mutation)

The I-Mutation:
I-mutation is a type of sound change found in the Germanic languages, wherein a back vowel is raised to a front vowel. This linguistic phenomenon affected the plural form of “mouse,” which in Old English was “mȳs,” pronounced similarly to the modern-day “mice.”

Key Etymological Points:

  • The word “mouse” has cognates in other Germanic languages, such as Mus in German and muis in Dutch.
  • In Old English, the vowel change from “ū” to “ȳ” is an example of i-mutation, which is a common process in the formation of plurals.
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Proto-Indo-European Roots:

  • The Proto-Indo-European root “*mu̯s-” is thought to be the ancestral form from which “mouse” derived.
  • It evolved through Proto-Germanic as “*mūs,” with the same meaning.

Tables Illustrating Word Evolution:

Language StageWordMeaning
Proto-Indo-European*mu̯s-small rodent
Old Englishmūsmouse (singular)
Old EnglishPlural FormModern EnglishPlural Form

Examples of the Word “Mouse” in Sentences


  • A single mouse scurried across the kitchen floor.
  • In the field, three mice were spotted nibbling on grains.

Computer Device:

  • She bought a new mouse for her laptop.
  • The office ordered twenty computer mouses due to the growing number of employees.
computer mousemouses/mice
  • The child was delighted when she found a mouse nest in the garden with several baby mice.
  • His desk drawer contained two broken mice, which he planned to fix over the weekend.
  • The pet store sells different breeds of mice for those who prefer them over traditional pets.

Examples of the Plural “Mice” in Sentences

Consider the following sentences which demonstrate the usage of “mice” in varied contexts:

  • The farmer set traps in the barn to catch the mice that were eating the grain.
  • Children often learn about mice in their science classes because they are common examples of mammals.

In literature and daily conversation, “mice” can be used as follows:

  • The fairytale described three blind mice that roamed the house without direction.
  • She heard the unmistakable squeak of mice coming from the basement.

The term “mice” maintains its form across various tenses and constructions:

  • There were mice in the old attic last summer.
  • There are mice living in the field behind the house.

Utilizing tables, consider these examples structured grammatically:

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The micearescurrying across the kitchen.
A group of micewasfound nesting in the garage.

Sayings with “Mouse” / “Mice”

Here, we explore some of these phrases and their meanings.

As quiet as a mouse
This simile equates the silence or discretion of a person to the supposed quietness of a mouse. It often describes someone who is moving or behaving in a way that avoids drawing attention.

When the cat’s away, the mice will play
This proverb suggests that people will take advantage of the absence of authority to behave more freely or less responsibly than they would otherwise.

As quiet as a mouseDescribes someone being very quiet or discreet
To play cat and mouseTo engage in a cunning game of evasion or pursuit

To play cat and mouse
This phrase describes a situation where someone alternates between pursuing and evading another, similar to the way a cat toys with a captured mouse.

Mice and men often go awryPlans may fail regardless of how well they are set

Mice and men often go awry
This saying is derived from Robert Burns’ poem “To a Mouse,” which has been further popularized by the title of John Steinbeck’s novel “Of Mice and Men.” It means that, despite our best efforts, things may not always go as planned.

  • Like a mouse in a maze
    This simile is often used to describe someone who feels lost or is struggling to find their way through a complex situation or environment.

Terms for Male, Female, and Baby Mice

Gender-Specific Terms for Mice

Male Mice: Known as bucks in both pet and scientific communities, male mice are vital for breeding purposes and can easily be distinguished from females upon reaching maturity.

  • Female Mice: Referred to as does, female mice are recognized by their ability to produce offspring multiple times a year, making them an essential part of any breeding program.
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Terminology for Baby Mice

The offspring of mice, commonly known as pinkys due to their distinct pink skin at birth, develop rapidly. Within two weeks, these baby mice begin to exhibit fur and open their eyes.

Collective Nouns for Groups of Mice

When referring to mice collectively, there are several nouns that one can employ to describe a grouping of these rodents. Here are two tables that classify these collective nouns:

Table 1: Traditional Collective Nouns

Collective NounContext
A nest of miceOften used when referring to a group living within a common space, like a burrow.
A mischief of miceSuggests a playful or troublesome group of mice.

Table 2: Alternative Collective Nouns

Collective NounContext
A group of miceA general term for any number of mice gathered.
A horde of miceImplies a large, possibly overwhelming number of mice.

These terminologies not only assist in identifying mice based on gender and age but also provide a linguistic framework to convey their social groupings.

Collective Nouns for Mice

Common Collective Nouns

  • A mischief of mice
  • A nest of mice
  • A colony of mice
  • A harvest of mice

These terms are particularly evocative, painting a vivid picture of the group in the reader or listener’s mind. For instance, a ‘mischief’ suggests a playful or cheeky nature, which is often how mice are perceived given their quick, elusive movements.

Usage in Sentences

  • The mischief of mice scurried away as the footsteps approached.
  • Researchers observed the feeding habits of a nest of mice.

Contextual Variations
In some contexts, especially when referring to mice in scientific observations or studies, alternative terms may be used. It is crucial to select a collective noun that accurately conveys the specifics of the group being discussed.

Scientific SettingLiterary Description
A population of miceA horde of mice
A sample of miceA scamper of mice


  • The population of mice provided significant data for the study.
  • A horde of mice invaded the pantry, much to the homeowner’s dismay.

In Review: Plural of “Mouse”

Rodent Variation:
When referring to the small, typically furry rodent, the word “mouse” becomes “mice.”

Computer Accessory Variation:
In the context of the computer accessory, the plural can be either “mice” or “mouses.” Both are considered correct, although “mice” is more commonly used.

Pluralization in Context

ContextCorrect Plural Form
Computer Accessorymice or mouses

This distinction is important in English language usage, and the dual plural forms for the non-living object reflect a more modern accommodation in language as technology evolves.

Usage in Sentences

  • When referring to more than one rodent:
    • “She discovered a family of mice in the old farmhouse.”
  • For multiple computer devices:
    • “He has two wireless mouses on his desk.”


  1. Collective noun for mice
  2. Terms for male/female/baby mice
  3. Plural of animals quiz
  4. I-mutation

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