Capable of producing something, especially in abundance; fertile.
Yielding good or useful results; constructive.
Of, or relating to the creation of goods or services.
(of an affix or word construction rule) 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.