This noun follows the standard English plural rule: simply add -s to the singular form.
Metastasise is regular. It follows the Standard -s rule.
Use plural verbs: "The metastasises are ready" (not "is ready").
Yes. The plural metastasises is standard across all English variants.
The word metastasise follows the standard English pluralization rule. When forming the plural, metastasise becomes metastasises. This follows the Standard -s pattern, which is one of the most common plural rules in English.
Understanding why metastasise becomes metastasises helps with spelling and pronunciation. This noun follows the standard English plural rule: simply add -s to the singular form.
When using metastasises in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The metastasises are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.