subjacent
Concise Oxford English Dictionary © 2008 Oxford University Press:
subjacent /səbˈdʒeɪs(ə)nt/
▶adjective technical situated below something else.
– derivatives
subjacency noun.
subjacency noun.
– origin C16: from L. subjacent- ‘lying underneath’, from sub- ‘under’ + jacere ‘to lie’.
'subjacent' also found in these Oxford entries:

