capable of being or liable to be observed; noticeable; visible; discernible: an observable change in attitude.

What does observably mean?

adj. 1. Possible to observe: observable phenomena; an observable change in demeanor. 2. ... A physical property, such as weight or temperature, that can be observed or measured directly, as distinguished from a quantity, such as work or entropy, that must be derived from observed quantities.

Is observably a word?

in a way that can be noticed or seen: The days are becoming observably longer.