I’m not sure why I started thinking about this yesterday, but I got really curious what exactly “e.g.” stands for. So after a few quick searches through my dictionary, which I actually use more than you could probably guess, here are a few words/abbreviations that you may have wondered about before, too.
e. g. — Latin; exempli gratia; literally “for example”
i. e. — Latin; id est; literally “that is,” but I usually think of it as “such as” or “as in”
et al — Latin; shortened form of et alli (masc), et aliae (fem), and et alia (neut); literally “and others,” you see it a lot in lists of authors when they don’t want to list them all
m. o. — Latin; modus operandi; literally “mode of operation” or mode of working
sic — actually an English word (I had no idea), though from the Latin meaning “so” or “thus,” usually seen in parentheses when something is written/quoted as it was originally written, most often used because there was some kind of mistake the first time and it the current writer wants you to know it was the way the earlier writer wrote it