from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the splitting of single spectral lines into three (or more) in the presence of a magnetic field
from the GNU version of the Collaborative International Dictionary of English
- The widening and duplication, triplication, etc., of spectral lines when the radiations emanate in a strong magnetic field, first observed in 1896 by P. Zeeman, a Dutch physicist, and regarded as an important confirmation of the electromagnetic theory of light.
from The Century Dictionary and Cyclopedia
- n. See effect.
After Pieter Zeeman, Dutch physicist. (Wiktionary)