functional calculus is a noun meaning "a system of symbolic logic that represents individuals and predicates and quantification over individuals (as well as the relations between propositions)". It carries one recorded sense.
a system of symbolic logic that represents individuals and predicates and quantification over individuals (as well as the relations between propositions)
Definitions, synonyms and semantic relations for functional calculus come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.