pertaining to the sense of touch
Painting is a visual art, but sculpture is both visual and tactile.
tangere (to touch) (Latin)
It sounds similar to Reptile (class of animals e. g Snake). Now this animals e. g snake are quite sensitive or react suddenly when see something. thus quite sensitive and as we can't touch them so related to touch. CON-tact - If you are in contact with something, you are in touch with it and hence it is tactile.