American Dictionary of the English Language

PERCEP'TIBLE, adjective [Latin percipio, perceptus.]

1. That may be perceived; that may impress the bodily organs; that may come under the cognizance of the senses; as a perceptible degree of heat or cold; a perceptible odor; a perceptible sound. A thing may be too minute to be perceptible to the touch.

2. That may be known or conceived of.