A person who believes in spiritual naturalism.

plural of natural science

Timing sexual intercourse to avoid the time of ovulation (if pregnancy is not wanted) or to fall within that time (if pregnancy is desired).

(computing) a feature that already exists in the environment in which an application is run.

plural of national costume

An organic fiber that is obtained naturally, notably from a plant or animal.

plural of nature preserve

Economic policies that favour the home nation, sometimes at the expense of other nations.

One's first language, learned in early childhood. / The language of a Native or Aboriginal people.

(category theory) A morphism between a pair of parallel functors such that if each object of the shared domain category subtends a correlated arrow — called a component — in the shared codomain (which arrow represents the difference between applying the second functor and the first functor to the correlated object) then each arrow of the shared domain subtends a commuting square — called a naturality square — between two components (correlated to the domain and codomain of the arrow).