perceptible

Universal Words adjective (formal) 1 great enough for you to notice it: a perceptible change / increase / decline / impact * The price increase has had no perceptible effect on sales. * Her foreign accent was barely perceptible. 2 (technical) that you can notice or feel with your senses: the perceptible world OPPIMPERCEPTIBLE perceptibly adverb: Income per head rose perceptibly. * It was perceptibly colder. * His voice softened perceptibly.