noun

• A person who breeds plants or animals (professionally).
• (cellular automata) A pattern that exhibits quadratic growth by generating multiple copies of a secondary pattern, each of which then generates multiple copies of a tertiary pattern.
• (slang, derogatory) A person who has had or who is capable of having children; a person who is focussed on the rearing of their own children.
• (gay slang, derogatory) A heterosexual; i.e. one whose sexual intercourse can lead to breeding.
• Ellipsis of breeder reactor; a type of nuclear reactor that creates more fissile material than it consumes, often used for the production of atomic weapons. [A nuclear reactor that generates more fissile material than it consumes.]