subduction
Concise Oxford English Dictionary © 2008 Oxford University Press:
subduction /səbˈdʌkʃ(ə)n/
▶noun Geology the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
– derivatives
subduct verb.
subduct verb.
– origin 1970s: via Fr. from L. subductio(n-), from subduct-, subducere ‘draw from below’.
'subduction' also found in these Oxford entries:

