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

  • n. The final stage of the prophase in meiosis, characterized by shortening and thickening of the paired chromosomes, formation of the spindle fibers, disappearance of the nucleolus, and degeneration of the nuclear membrane.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the last stage of prophase, in which the nucleolus and nuclear envelope disappear, spindle fibers form, and the chromosomes shorten in preparation for anaphase.

from The Century Dictionary and Cyclopedia

  • n. In cytology, the segmented spireme stage in the primary oöeyte or spermatocyte.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the final stage of the prophase of meiosis


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