ap·pre·cia·ble /əˈpriʃəbəl, ˈprɪʃ(i)əbəl/
Ap·pre·ci·a·ble a. Capable of being appreciated or estimated; large enough to be estimated; perceptible; as, an appreciable quantity. -- Ap*pre*ci*a*bly, adv.
adj : enough to be estimated or measured; "appreciable amounts of
noxious wastes are dumped into the harbor"