Measurably is adverbially. When you say that something is measurably different, you are saying that it is different in a way that can be measured.
The temperature was measurably colder outside.
The test was measurably harder than the practice test.
ADV
to a measurable degree
1
The measurable quantity is recalculated.
2
The quantities on the right all are directly measurable.
3
The meter then measures the color of the strip optically.
4
It details the quantities involved in measuring the visibility of interference.
5
The dimension of the measure is the product of payload quantity and the length.
6
The difficulty in measuring the meter was the error in fringe counting.
7
The type of spectroscopy depends on the physical quantity being measured.
8
Another meter measures the instantaneous value of the radiation intensity.
9
The most common type of meter measures kilowatt hours.
10
The amount of cholesterol solubilized by the serum is then measured.