Plural of cuckoo (especially in scientific or specialized contexts); may also refer to members of the order Cuculiformes.
Latin plural form of 'cuculus' (cuckoo), used in scientific nomenclature and classical texts.
Scientists love Latin plurals—so instead of 'cuckoos' you get 'cuculi,' which sounds fancier and helps them feel like they're channeling ancient naturalists who wrote in Latin.
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