(grammar) The gender that a noun, etc. would be expected to have, based on attributes of the referent, such as physical sex.

(category theory) A natural transformation whose every component is an isomorphism.

(usually of death or dying) Causes such as illness or disease.

plural of natural economy

(economics) An economy in which money is not used in the transfer of resources among people.

(databases) A join between two tables on a field which has the same name.

plural of natural killer

plural of natural gender

(finance) Being or relating to a financial transaction that writes off a portion of a developing nation's foreign debt in exchange for local investments in environmental conservation.

plural of natural child