Tactile has to do with the sense of touch. There's a huge tactile difference between smooth glass and rough sandpaper.

Anything to do with touch can be described as tactile. Ever notice how a dog would rather sleep on a soft blanket than a rubbery leather couch? That's because dogs have tactile preferences: the softer the better. Different textures of food are tactile — they feel different in your mouth, aside from how they taste. You deal with the world of tactile things every day — you use your tactile sense whenever you touch anything.

Definitions of tactile
  1. adjective
    of or relating to or proceeding from the sense of touch
    “a tactile reflex”
    synonyms: haptic, tactual
  2. adjective
    producing a sensation of touch
    tactile qualities”
    synonyms: tactual
    tangible, touchable
    perceptible by the senses especially the sense of touch
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