Pronunciation: (mu-tam'u-riz"um), [key]
a. division into metameres, the developmental process of somite formation.
b. existence in a metameric state.
2. Chem.isomerism resulting from the attachment of different groups to the same atom, as C2H5NHC2H5 and CH3NHC3H7.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.