Meaning of metamerism

me•tam•er•ism

Pronunciation: (mu-tam'u-riz"um), [key]
— n.
    1. division into metameres, the developmental process of somite formation.
    2. existence in a metameric state.
  1. isomerism resulting from the attachment of different groups to the same atom, as CHNHCH and CHNHCH.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.