gametophyte

noun

ga·me·to·phyte | \ gə-ˈmē-tə-ˌfīt

Definition of gametophyte

: the haploid multicellular individual or generation of a plant or alga with alternation of generations that begins with a haploid spore, produces gametes by mitotic division, and ends with fertilization producing a diploid zygote and that constitutes the visibly dominant form in mosses and algae, exists as an independent plant body in ferns and their relatives, and is reduced to a microscopic or rudimentary state in seed plants — compare sporophyte

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Nowellia curvifolia (leafy liverwort) gametophyte, berberine stained. — Alan Taylor, The Atlantic, "Nikon Small World 2014," 21 Oct. 2014

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