Definitions

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

  • n. The smaller of two nuclei in ciliate protozoans that contains genetic material and functions in reproduction.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A small nucleus.
  • n. The smaller of the nuclei of a ciliate protozoan.

from The Century Dictionary and Cyclopedia

  • n. A small nucleus: distinguished from macronucleus.

Etymologies

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