Plural of calyculus, referring to multiple small cup-shaped botanical or zoological structures.
Latin plural of calyculus (second declension masculine nominative plural -i). This follows standard classical Latin declension patterns for diminutive nouns.
If you see 'calyculi' in a 19th-century botanical text, you're reading someone who learned their Latin properly—it's the grammatically correct plural, though many modern texts use the more English-sounding 'calycules'!
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