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