n.
Pronunciation: ˌ ī -s ə - ' kr ō -m ə - ˌ s ō m, - ˌ z ō m
Function: noun
Date: 1939
: a chromosome produced by transverse splitting of the centromere so that both arms are derived from the dyad on one side of the centromere of the parental chromosome and each arm has identical genes arranged in the same order counting away from the centromere