1936, in the meaning defined above
functional
functional calculus
functional determinant
“Functional calculus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/functional%20calculus. Accessed 22 Nov. 2024.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
See Definitions and Examples »
Get Word of the Day daily email!
Share