appreciable
adj. C1 Advanced US //əˈpɹiʃəbəɫ// UK //ɐpɹˈiːʃɪəbəl// ap·pre·cia·ble
adj. large enough to be noticed or measured. You use this to describe a change or amount that is not small or insignificant.
adj. sufficient in size, amount, or degree to be perceived or measured. Often used in technical or formal contexts to indicate a noticeable difference from a baseline.
The new software caused an appreciable increase in speed.
After the heavy rain, there was an appreciable rise in the water level of the river.
While the initial results were promising, the researchers noted that the effect was only appreciable after the subjects had been observed for several months.
From French appréciable. By surface analysis, appreci(ate) + -able.