: 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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Taking big breeder pythons out of native ecosystems is a victory for any Florida biologist.—Bill Kearney, Sun Sentinel, 19 Apr. 2026 The pavilion buzzed with activity as animal educators, conservationists, breeders and vendors filled the space.—Nicole Buss, Sacbee.com, 19 Apr. 2026 Go off word-of-mouth recommendations from friends and neighbors, and check that the breeder is AKC registered.—The Editors, Curbed, 16 Apr. 2026 An eccentric poodle breeder lures a broke college student to her remote ranch with a promise of research funding.—Ryan Lattanzio, IndieWire, 16 Apr. 2026 See All Example Sentences for breeder