An alternative plural form of actinobacillus; rod-shaped branching bacteria in the genus Actinobacillus.
From Greek 'aktis' (ray) + Latin 'bacillus' (rod). Uses the Latin -i plural ending instead of -us, reflecting scientific nomenclature flexibility.
The word has two plural forms because it comes from Latin and was Anglicized—scientists might say 'actinobacilli' using classical Latin rules or 'actinobacilluses' using English rules, depending on the journal and tradition.
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