Plural form of arillus; multiple arils or aril-like structures on seeds or fruits.
From Latin 'arillus' (singular) becoming 'arilli' (plural) following standard Latin second declension masculine pluralization patterns used in scientific nomenclature.
Latin plurals in scientific terminology like 'arilli' versus 'arils' show how scientists preserved the authority of classical learning—using Latin made discoveries feel more prestigious and universal to the educated classes.
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