It’s a “programmable semicolon” or “decorated-function composition”. I think most people that are confused about it, are trying to make it be more meaningful than it is. Haskell (?) just grabbed a math name so they’d have one word for it, because it’s a useful class name there.
http://blog.sigfpe.com/2006/08/you-could-have-invented-monads-and.html
It’s a “programmable semicolon” or “decorated-function composition”. I think most people that are confused about it, are trying to make it be more meaningful than it is. Haskell (?) just grabbed a math name so they’d have one word for it, because it’s a useful class name there.