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Codomain

//ˌkoʊ.doʊˈmeɪn// noun

Noun

1
The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.
"Definition 2.5. A function is onto if each element of the codomain has at least one element of the domain assigned to it. In other words, a function is onto if the range equals the codomain."
2
The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y.; The set B. broadly

From co- + domain.

Unscramble this word: codomain