et alii - Latin is Simple Online Dictionary

Comment

Used similarly to et cetera ("and the rest"), to stand for a list of names. Alii is masculine, so it can be used for men, or groups of men and women; the feminine, et aliae, is appropriate when the "others" are all female; but as with many loanwords, interlingual use (such as in reference lists) is often invariable. Et alia is neuter plural and thus in Latin text is properly used only for inanimate, genderless objects, but some use it as a gender-neutral alternative.[23] APA style uses et al. (normal font)[24] if the work cited was written by more than six authors; MLA style uses et al. for more than three authors; AMA style lists all authors if ≤6, and 3 + et al if >6. AMA style forgoes the period (because it forgoes the period on abbreviations generally) and it forgoes the italic (as it does with other loanwords naturalized into scientific English); many journals that follow AMA style do likewise.