Plural of frenum using a Latinized plural form, referring to multiple restraining or connecting tissue bands.
The proper Latin plural of frenum, maintaining the original Latin inflectional system where -um nouns form plurals with -a, though this form is now quite rare in English medical terminology.
Scientists sometimes use proper Latin plurals like 'frenuna' instead of 'frenums' to sound more technical, but it's a dying practice—modern English just wants to add -s to everything and call it a day!
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