Etymology
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et al.

also et al, 1883, abbreviation of Latin et alii (masc.), et aliæ (fem.), or et alia (neuter), in any case meaning "and others."

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Definitions of et al.

et al. (adv.)
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.
Synonyms: et al / et alii / et aliae / et alia
et al. (adv.)
and elsewhere (used when referring to other occurrences in a text);
Synonyms: et al / et alibi
From wordnet.princeton.edu