allogamy

In humans, the fertilization event is an instance of allogamy.

Cross-pollination, also called allogamy, occurs when pollen is delivered to a flower from a different plant.

Various aspects of floral morphology promote allogamy.

Outcrossing, cross-fertilization or allogamy, in which offspring are formed by the fusion of the gametes of two different plants, is the most common mode of reproduction among higher plants.