Et alia has 2 different meanings across 2 categories:
Adverb
· Phrase
Adverb
1
and others ('et al.' is used as an abbreviation of `et alii' (masculine plural) or `et aliae' (feminine plural) or `et alia' (neuter plural) when referring to a number of people)
"the data reported by Smith et al."
Phrase
1
And others; used of things; neuter plural