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Subliminal has its origin from the Latin words sub, which means below and limen, which means threshold.— Find Free Articles - ArticlesBase
This is from the Latin words sub, meaning under, and limen, meaning threshold.— Original Signal - Transmitting Buzz
This term is derived from 'limen' and 'post,' which explains why we say that the person who has been captured by the enemy and has come back into our territories has returned by postliminium: for just as the threshold forms the boundary of a house, so the ancients represented the boundaries of the empire as a threshold; and this is also the origin of the term 'limes, signifying a kind of end and limit.— The Institutes of Justinian
45 Ventum erat ad limen, cum virgo, 'poscere fata Tempus,' ait; 'deus, ecce, deus.'— Marmion
Satur fu fere Mars, limen sali, sta berber!— The Religious Experience of the Roman People From the Earliest Times to the Age of Augustus

American Heritage Dictionary (1)
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