And as shown above OED deals so exceptionally well with all concepts... down to the second. Where it sends you to SI to get the proper definition. Can you show

And as shown above OED deals so exceptionally well with all concepts... down to the second. Where it sends you to SI to get the proper definition. Can you show me what OED says for ultrapure? How about secret and top secret? Ultraspherical and hypergeometric? And don't forget the cleanroom. Try to put that "wit" into understanding that in highly specialized fields the terminology might get different meanings and none of it is wrong.