archaeomagnetism
Concise Oxford English Dictionary © 2008 Oxford University Press:
archaeomagnetism/ɑːkɪəʊˈmaɡnɪtɪz(ə)m/
▶noun magnetism possessed by components of clay and rocks which have in the past been heated, especially as studied in a method of geological or archaeological dating.
– derivatives
archaeomagnetic adjective.
archaeomagnetic adjective.
'archaeomagnetism' also found in these Oxford entries:

