Sentence:  <WSD>"Haptic</WSD> feedback", or virtual touch, can also contribute to an IVE [immersive virtual environment] by providing forces or resistance with a physical device that resists a physical hand or finger. ... Vibration motors in smartphones and tablets can also be seen as a rudimentary form of <WSD>haptic</WSD> feedback. 
Meaning of the word marked with <WSD> tags:  Of or relating to (the study of user interfaces that use the sense of touch).