My answer always included the qualification that "genii" is limited to a particular meaning of "genius". If you use the word to mean "an intelligent person" then the plural can only be "geniuses".
grammar - What is the plural of the word "genius"? - English Language ...
It is perfectly correct and grammatical. "genius" as a concept (of brilliance, inventiveness, etc.) predates genius as a person (one gifted with genius). And one of the early meanings of "to answer" is to rise up to the challenge.
Genius is the correct spelling that comes directly from Latin: word-forming element making adjectives from nouns, meaning "having, full of, having to do with, doing, inclined to," from Old French -ous, -eux, from Latin -osus.
Why is "genius" often misspelt as "geniOus"? What are its etymons ...
Do a Google search for delicate genius and you will get many results, none seem to be a definition though. I was referred to as a delicate genius today after making a mistake at work. I am not a l...
meaning - What does the term "delicate genius" refer to? - English ...
On the surface, one might think that ingenious is somehow based on the word genius. Interestingly, this is not true. The word ingenious does not actually have the in- prefix for negation. Instead, it comes originally from the Latin ingeniōsus, which means "intellectual, talented, ingenious". At times in history it was also spelled "engenious". Indeed, ingeniōsus appears to be the same root ...
The normal plural is "geniuses"; "genii" is not used in everyday language. The word "genius" does come from Latin, but it's gone through a long journey to get to English and its meaning has shifted quite a bit along the way. So it is pluralized according to the normal English pattern. The issue is complicated a bit by the fact that the Latin word, with the Latinate plural "genii", does ...