subliminal is incorrectly written and it should be written as "subliminal" being its meaning:
subliminal = subliminalsubliminal. ( sub - and lat. Limen - nis, 41 threshold.1. adj. Psicol. That is below the conciencia.2 threshold. adj. Psicol. Said of a stimulus: which by their weakness or as soon as it is not consciously perceived, but it influences behavior.