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English word sensor comes from English sense, English -or
sense (English)
To comprehend.. To instinctively be aware.. To use biological senses: to either smell, watch, taste, hear or feel. (biochemistry) referring to the strand of a nucleic acid that directly specifies the product.. Perception through the intellect; apprehension; awareness.. Any of the manners by which living beings perceive the physical world: for humans sight, smell, hearing, touch, taste.. [...]
-or (English)
(electrical science) Appended to the names of members of classes of components, especially those that have an extensive property name of the same root suffixed with -ance. Creates an agent noun, indicating a person who does something.
sensor (English)
A device or organ that detects certain external stimuli and responds in a distinctive manner.