CytologyBiology any nucleus which, after plasmogamy, coexists with and does not fuse with another nucleus in the same cell. [ < German Gonomer (V. Häcker 1902, in Jenaische Zeitschr. f. Naturwiss.37ii. 312) < gono-gono-comb. form + -mer-merecomb. form.]
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1903 Bot. Gaz. June 443 The nuclear stages in which the idiomeres (partial nuclei) and gonomeres (double nuclei) appear are closely related.
1920 W. E. AgarCytol. 78 In prophase each gonomere forms its chromosomes separately from the other.