Perceivable (adjective)

1. Able to be perceived; noticeable or recognizable by the senses or by the mind.
2. Capable of being understood; intelligible.

Origin:

The word "perceivable" is derived from the verb "perceive" which comes from the latin word "percipere" meaning "to take or grasp" and was first used in english in the 15th century.

Examples:

1. The changes in the weather were barely perceptible.
2. The difference in taste was not perceptible to me.
3. The color change was so subtle it was almost imperceptible.
4. It was a perceptible shift in her attitude.
5. The perceptible change in the air pressure signaled a storm was coming.