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