Dictionary
or•bit•al
Pronunciation: (ôr'bi-tl), [key]—
adj.
of or pertaining to an orbit.
—
n.
Physics, Chem.
a. a wave function describing the state of a single electron in an atom
(atomic orbital) or in a molecule
(molecular orbital).
b. the electron in that state.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.