Nouns ending in -a (often Latin or scientific) add -e to form the plural.
Subpoena is regular. It follows the -ae Addition rule.
Use plural verbs: "The subpoenae are ready" (not "is ready").
Yes. The plural subpoenae is standard across all English variants.
The word subpoena follows the standard English pluralization rule. When forming the plural, subpoena becomes subpoenae. This follows the -ae Addition pattern, which is one of the most common plural rules in English.
Understanding why subpoena becomes subpoenae helps with spelling and pronunciation. Nouns ending in -a (often Latin or scientific) add -e to form the plural.
When using subpoenae in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The subpoenae are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.