Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of several polypeptides that are produced by a body tissue and that cause the reversible inhibition of mitosis in the cells of that tissue.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry Any of several polypeptide hormones that reversibly inhibits mitosis in the tissues that produce them

Etymologies

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

[From Greek khalōn, present participle of khalān, to slacken.]

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