I have been reading some papers on air transport management and I have found the word minimum is pluralized as minima. E.g.: landing minima.
I always thought the plural of minimum is minimums. I have looked it up on Google and I have found that both are accepted.
Which word (minima/minimums) do the people use when speaking in a normal context? (Out of curiosity I would also like to know where does the word minima come from? Since in English plurals are never done like that.)