Definition from Wiktionary, the free dictionary
- (nonstandard) plural of
2002 September 19, "grampus", “"OT: What is a #!%$*& "cookie"?"”, in rec.radio.shortwave, Usenet, retrieved 2008-03-21:
- And unlike Jonah, dozens of my incisive life-affirming cancer-curing magnum opi are still entombed in the bowels of this pitiless machine and millions of respondents don't even know how disappointed they are not to read them.
- Magnum opi is an erroneous Latin form, taking the noun as second declension instead of third, and ignoring the adjective inflection. The correct Latin plural, also used in English, would be magna opera.