: 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 alsobreeder reactor
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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
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