appreciable
ap·pre·cia·ble
/əˈpriːʃəbəl/ adj
: large enough to be noticed or measured
Researchers found that the chemical made no appreciable [=noticeable, perceptible] difference in the results.
Appreciable [=(more commonly) significant] numbers of these plants grow in this region.
ap·pre·cia·bly /əˈpriːʃəbli/ adv
Her appearance has not changed appreciably. [=significantly]