The plural form of 'mouse' is 'mice'. It's an example of an irregular plural noun in English, where the pattern does not follow the typical rule of simply adding an 's' or 'es' to a singular noun. Instead, 'mouse' undergoes a vowel change to become 'mice' in the plural form. This irregularity is similar to other animal-related nouns such as 'foot' which becomes 'feet', highlighting the unique nature of English noun pluralization.
