from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The nucleus of a fertilized egg immediately after the male and female nuclei have fused.

from The Century Dictionary and Cyclopedia

  • n. The paired nuclei which are found in certain stages of the life-cycle of the Uredinales and the higher Basidiomycetes, and whose union is regarded as an act of fertilization. Incorrectly synkarion.


syn- + Greek karuon, nut, seed; see kar- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)


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