Meaning of archaeomagnetism dating

ar•chae•o•mag'ne•tism dat"ing

Pronunciation: (är"kē-ō-mag'ni-tiz"um), [key]
  1. the dating of archaeological specimens by determination of the magnetic alignment of objects containing ferromagnetic materials, as baked clay pots, within undisturbed archaeological sites.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.