orbital:1

adjective
or*bit*al \ ˈȯr-bə-tᵊl \
1846{ds||1||}
  • of, relating to, or forming an orbit (such as the orbit of a moon, planet, or spacecraft)
  • following a circular path around an urban area

orbital:2

adjective
orbital \
circa 1541
  • of, relating to, or located near the orbit of the eye

orbital:3

noun
orbital \
1932
  • a mathematically described region around a nucleus in an atom or molecule that may contain zero, one, or two electrons

molecular orbital

noun
molecular orbital \
1932
  • a solution of the Schrödinger equation that describes the probable location of an electron relative to the nuclei in a molecule and so indicates the nature of any bond in which the electron is involved
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