damn you latin, why won't you DIE?

[saint_monkey]

exempli gratia(ex-EMP-lee GRAH-tee-uh) “For example.” Usually abbreviated to ‘e.g.’ and often confused with ‘i.e.’ Example: “Many real numbers cannot be expressed as a ratio of integers, e.g., the square root of two.”

id est(id EST) Literally, “that is.” Usually abbreviated ‘i.e.’ and often confused with ‘e.g.’ Example: “She won the race, i.e., she crossed the finish line first.” The decision whether to use ‘i.e.,’ or ‘e.g.’ should be based on whether “that is” or “for example” is what is wanted in the sentence.

quod erat demonstrandum(KWAWD eh-RAHT dem-on-STRAHND-um) “That which was to have been proved.” Traditionally placed at the end of proofs, the QED is now usually indicated by a small square. A few students have clung to use of the traditional letters, in the hope they might be interpreted as “quite elegantly done.”

et al.(ETT ALL) Abbreviation of et alia, meaning “and others.” Used to indicate an unstated list of contributing authors following the main one, for instance.

ibidem(ib-EED-em) “In the same place.” Used in footnotes to indicate that the reference is the same as the preceding one(s).

in re(IN RAY) “In regards to.” Often used to head formal correspondence. When only re is written, it should be translated as “regarding.”

ad nauseam(add NAWS-ee-um) Something continues ad nauseam when it goes on so long you become sick of it.

amen to that last one.

(all latin graciously cut and pasted from: http://www.mathacademy.com/pr/prime/articles/latin/)