Tactual adj. (Physiol.) Of or pertaining to the sense, or the organs, of touch; derived from touch. "In the lowest organisms we have a kind of tactual sense diffused over the entire body."
... exact practical results, as soon as distinct practical questions are raised. There would be no difficulty in measuring the reaction times of the horses in thousandths of a second for optical and acoustical and tactual impressions, or in studying the influence of artificial colour effects on the various insects ... — Psychology and Social Sanity • Hugo Muensterberg
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