from The Century Dictionary.

  • noun The nucleus of a spermatozoön; a spermococcus or sperm-kernel.
  • noun In botany, the nucleus of a male gamete, which coalesces with the nucleus of an oösphere to form a germ-nucleus.


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word sperm-nucleus.


  • Each is provided with its own distinct nucleus or cell-kernel, for the first step in the division of the egg-sphere is the division within it of its newly constituted nucleus into two, each half consisting of nearly equal proportions of the mingled substance of the sperm-nucleus and the egg-nucleus.

    More Science From an Easy Chair

  • In Figure 1.26 the little sperm-nucleus (sk) moves towards the larger nucleus of the ovum (ek).

    The Evolution of Man — Volume 1

  • But this hereditary disposition, the essence of every human soul, is not "eternal," but "temporal"; it comes into being only at the moment when the sperm-nucleus of the father and the nucleus of the maternal ovum meet and fuse together.

    The Evolution of Man — Volume 1


Log in or sign up to get involved in the conversation. It's quick and easy.