per ‧ cep ‧ ti ‧ ble /pəˈseptəb ə l, pəˈseptɪb ə l $ pər-/ BrE AmE adjective formal
[ Word Family: noun : ↑ perception , ↑ perceptiveness ; adverb : ↑ perceptibly ≠ ↑ imperceptibly , ↑ perceptively ; adjective : ↑ perceptible ≠ ↑ imperceptible , ↑ perceptive ; verb : ↑ perceive ]
something that is perceptible can be noticed, although it is very small OPP imperceptible :
a small but perceptible change
The sound was barely perceptible.
—perceptibly adverb :
the light dimmed perceptibly