Pronunciation: (ī"sō-i-lek-tron'ik, -ē"lek-), [key]
—adj. Physics, Chem.
1. noting or pertaining to atoms and ions having an equal number of electrons.
2. noting or pertaining to atoms, radicals, or ions having either an equal number of electrons or an equal number of valence electrons.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.