functor

[ fuhngk-ter ]
/ ˈfʌŋk tər /

noun

that which functions.
Linguistics. a function word or affix.
Compare contentive.

Origin of functor

First recorded in 1935–40; funct(ion) + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019