Perception
PERCEP'TION, noun [Latin perceptio. See [[Perceive]].]
1. The act of perceiving or of receiving impressions by the senses; or that act or process of the mind which makes known an external object. In other words, the notice which the mind takes of external objects. We gain a knowledge of the coldness and smoothness of marble by perception
2. In philosophy, the faculty of perceiving; the faculty or peculiar part of man's constitution, by which he has knowledge through the medium or instrumentality of the bodily organs.
4. The state of being affected or capable of being affected by something external.
This experiment discovers perception in plants.