Pronunciation: (kon'sti-tOO"tiv, -tyOO"-), [key]
1. constituent; making a thing what it is; essential.
2. having power to establish or enact.
3. Physics, Chem.pertaining to a molecular property determined primarily by the arrangement of atoms in the molecule rather than by their nature or number.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.