<genetics, molecular biology> A somatic hybrid cell in which chromosomes from two different parental cells are enveloped in a single nucleus. ... (19 Jan 1998) ... 
(sin-kar´e-on) a nucleus formed by fusion of two pronuclei, the fertilization nucleus.
A somatic hybrid cell in which chromosomes from two different parental cells are enveloped in a single nucleus.
Type: Term Pronunciation: sin-kar′ē-on Definitions: 1. The nucleus formed by the fusion of the two pronuclei in karyogamy. Synonyms: syncaryon
a nucleus formed by the fusion of two preexisting nuclei.