What is 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. Tyndall called?

tactual — 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. Tyndall. (Webster's 1913.)

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