an animal, plant, or person that produces offspring or reproduces.
a person who raises animals or plants primarily for breeding purposes.
Also called breeder reactor. Energy. a nuclear reactor in which more fissile material is produced than is consumed.
a type of nuclear reactor that produces more fissionable material than it consumes Compare converter reactor See also fast-breeder reactor
a person who breeds plants or animals
something that reproduces, esp to excess: rabbits are persistent breeders
an animal kept for breeding purposes
a source or cause: a breeder of discontent
short for breeder reactor
breeder reactor
A nuclear reactor that is used to create fissionable material (such as plutonium-239) by exposing nonfissionable material (such as uranium-238) to radiation. The source of the radiation is usually some other fissionable material. Breeder reactors produce more fissionable material than they use up.

Note: Breeder reactors are designed to produce more fuel than they consume.

Note: The development of the breeder reactor has been stopped in the United States, but continues to be pursued in Europe and Japan.


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  • Breeding

    the producing of offspring. the improvement or development of breeds of livestock, as by selective mating and hybridization. Horticulture. the production of new forms by selection, crossing, and hybridizing. training; nurture: He is a man of good breeding. the result of upbringing or training as shown in behavior and manners; manners, especially good manners: You […]

  • Breeding-ground

    a place where animals breed or to which they return to breed. an environment suitable for or fostering the development of an idea, thing, etc.: a breeding ground for violence. Historical Examples Shandygaff Christopher Morley The Last Shot Frederick Palmer Hugh Arthur Christopher Benson Witching Hill E. W. Hornung Selected Works of Voltairine de Cleyre […]

  • Breeding-plumage

    nuptial plumage. the plumage assumed by a male bird during the courtship period, especially in those species that are more colorful at this period. Historical Examples Birds of Guernsey (1879) Cecil Smith Birds and all Nature, Vol. V, No. 5, May 1899 Various

  • Breeks

    breeches; trousers. Historical Examples The Proverbs of Scotland Alexander Hislop The Proverbs of Scotland Alexander Hislop Reminiscences of Scottish Life and Character Edward Bannerman Ramsay Soldiers Three, Part II. Rudyard Kipling Wappin’ Wharf Charles S. Brooks Wappin’ Wharf Charles S. Brooks The Three Perils of Man, Vol. 3 (of 3) James Hogg The House with […]

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