👉 Endospermous is a term used in botany and genetics to describe a type of seed that has been fertilized by an exogenous (non-indigenous) factor, such as pollen. In other words, this refers to a seed that has undergone some kind of modification or change from its natural state, typically due to the presence of foreign substances, like pollen grains, in the environment. The term comes from Greek and means "seed with an endosperm," which is a type of