productive.

Capable of producing something, especially in abundance; fertile.

Yielding good or useful results; constructive.

Of, or relating to the creation of goods or services.

Consistently applicable to any of an open set of words.

Of a cough, producing mucus or sputum from the respiratory tract.

Of inflammation, producing new tissue.

A type of set of natural numbers, related to mathematical logic; a set S is productive if there exists a total recursive function f such that ∀x∈ℕ,~~W_x⊆S⇒f(x)∈A⧵W_x, where W_x is a recursive function whose Gödel number is x.

a productive set