Meaning of spectral series

spec'tral se'ries

Pronunciation: [key]
— Physics. Physics.
  1. a series of lines in the spectrum of light emitted by excited atoms of an element, each line being related to the others in the series by a simple numerical equation and identified with a particular energy level of an atom of the element.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.