Adv.1.et al. - 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."
et al, et alia, et aliae, et alii
2.et al. - and elsewhere (used when referring to other occurrences in a text)
et alibi, et al