from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The most condensed and constricted region of a chromosome, to which the spindle fiber is attached during mitosis.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The central region of a eukaryotic chromosome where the kinetochore is assembled.
from the GNU version of the Collaborative International Dictionary of English
- n. a specialized condensed region of a chromosomes that appears during mitosis where the chromatids are held together to form an X shape.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape
From German Centromer, corresponding to centro- + Ancient Greek μέρος ("part"). (Wiktionary)