Word Study
centromere
CIDE DICTIONARY
centromere, n.
a specialized condensed region of a chromosomes that appears during mitosis where the chromatids are held together to form an X shape. [WordNet 1.5]
OXFORD DICTIONARY
centromere, n. Biol. the point on a chromosome to which the spindle is attached during cell division.
Etymology
L centrum centre + Gk meros part
For further exploring for "centromere" in Webster Dictionary Online