Perceptible, a.
Etymology: [L. perceptibilis: cf. F. perceptible. See Perceive.]
Capable of being perceived; cognizable; discernible; perceivable. With a perceptible blast of the air. Bacon. -- Per*cep"ti*ble*ness, n. -- Per*cep"ti*bly, adv.
Shades of meaning
Fernald has no entry of its own for perceptible; he lists it under evident.
He lists it without comment; the entries above explain its neighbors.