What does outcrossed mean?
“Outcrossed” is the past tense and past participle of the verb “outcross,” and it is also used as an adjective for offspring or material produced through this process. In animal and plant breeding, outcrossing means crossing an individual from a particular breed, strain, or population with one from outside that group. The term is especially useful when discussing managed breeding programs, where crossing with outside stock can introduce useful traits or help reduce the risks associated with inbreeding. An outcrossed animal or variety is not necessarily the same as a generic crossbred: “outcrossed” highlights the source of the outside genetic material, while “crossbred” generally refers to a hybrid produced from distinct breeds. Outside genetics, the word is uncommon and is most often encountered in specialist writing.
To cross an organism or its genetic material with an individual from outside the relevant breed, strain, or population.
"The breeder outcrossed the herd with a genetically distinct line."
Usually transitive, though it can also be used intransitively in breeding contexts.
Produced by crossing with an individual from outside the relevant breed, strain, or population.
"The outcrossed hybrids showed greater resistance to the local disease."
Common chiefly in animal breeding, horticulture, and genetics.
An outcross is a deliberate genetic bridge: it brings outside material into a breeding population without requiring the population to abandon its own identity.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does outcrossed come from?
The word is formed in English from the prefix “out-” and the verb “cross,” in the sense of producing offspring or combining genetic material across groups. The underlying word “cross” is an old English term with Germanic roots, while the compound use in animal breeding developed in the modern period of systematic breeding and genetics. Related forms include “outcross,” “outcrossing,” and “crosswise,” all sharing the same central idea of crossing or extending across boundaries.
Related word forms
How outcrossed is actually used
This is primarily a technical term used in animal breeding, plant breeding, and genetics. It is less common in everyday language and often implies a deliberate crossing designed to introduce genetic variation or reduce inbreeding.
Easily confused with outcrossed
“Crossbred” means produced by crossing two distinct breeds, whereas “outcrossed” specifically emphasizes crossing with an individual from outside the breed, strain, or population being managed.