Meaning of isosteric

i•so•ster•ic

Pronunciation: (ī"su-ster'ik), [key]
— adj.
  1. having the same number of valence electrons in the same configuration but differing in the kinds and numbers of atoms.
  2. having or showing equal atmospheric density.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.