synkaryon

Noun

synkaryon (plural synkaryons or synkarya)

1. A cell nucleus formed by the fusion of two preexisting nuclei (such as in an egg and a sperm cell)
   • The active pronucleus of each pair moves across the protoplasm and fuses with the opposite passive pronucleus, and thus two synkarya are formed. Each synkaryon divides into four, and thus each cell contains at this period eight nuclei which form the nuclei of eight spores, protected within the...1908, J[ames] Martin Beattie, W[illiam] E[lliot] Carnegie Dickson, A Text-Book of General Pathology: For the Use of Students and Practitioners, London: Rebman, Limited, […], page 356
   • Persistence of two functional synkarya appears to be a clear recapitulation of the ancestral temporary conjugation, when two exconjugants developed. In the second type (Fig. 47, b), this recapitulation is not so strong. Here, although each conjugant produces two pronuclei and two synkarya are...1972, I. B. Raikov, “Nuclear Phenomena During Conjugation and Autogamy in Ciliates”, in Tze-Tuan Chen, editor, Research in Protozoology, volume 4, Pergamon Press, →LCCN, pages 235–236