— subliminally , adv.
/sub lim"euh nl/ , adj. Psychol.
existing or operating below the threshold of consciousness; being or employing stimuli insufficiently intense to produce a discrete sensation but often being or designed to be intense enough to influence the mental processes or the behavior of the individual: a subliminal stimulus; subliminal advertising.
[ 1885-90; SUB- + L limin- (s. of limen ) threshold + -AL 1 ]