breeder

noun

breed·​er ˈbrē-dər How to pronounce breeder (audio)
: one that breeds: such as
a
: an animal or plant kept for propagation
b
: one engaged in the breeding of a specified organism
c
: a nuclear reactor designed to produce more fissionable material than it uses as fuel

called also breeder reactor

Examples of breeder in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adult Ducks: Commercial layer or breeder pellets for ducks with 14–16% protein; increase to 16–18% during the laying period. Josh Hammer, MSNBC Newsweek, 1 Apr. 2025 But the work of smaller, independent breeders like Mr. Baker is important creatively in the market, and to the evolving looks of coleus. Margaret Roach, New York Times, 25 Mar. 2025 In Cambridge, some tolerant Democrats have charitably adopted a don’t-ask-don’t-tell policy about breeders. Howie Carr, Boston Herald, 22 Mar. 2025 Unlike reputable breeders who prioritize responsible breeding and health checks, backyard breeders often operate in poor conditions. Kelli Bender, People.com, 10 Mar. 2025 See All Example Sentences for breeder

Word History

First Known Use

1531, in the meaning defined above

Time Traveler
The first known use of breeder was in 1531

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Cite this Entry

“Breeder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/breeder. Accessed 7 Apr. 2025.

Medical Definition

breeder

noun
breed·​er
: one that breeds: as
a
: an animal or plant kept for propagation
b
: one engaged in the breeding of a specified organism

More from Merriam-Webster on breeder

Last Updated: - Updated example sentences
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