centromeric

from WordNet (r) 3.0 (2006)

centromeric
    adj 1: pertaining to the dense specialized portion of a
           chromosome to which the spindle attaches during mitosis

from The Collaborative International Dictionary of English v.0.48

centromeric \centromeric\ adj. (Biol.)
   pertaining to the centromere, the dense specialized portion
   of a chromosome to which the spindle attaches during mitosis.
   [WordNet 1.5]