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

Encyclopedia: Et al