Look up haptic in Wiktionary, the free dictionary.
Haptics is any form of nonverbal communication involving touch (from Greekἅπτω = 'I fasten onto, I touch').
Haptic customs differ greatly throughout the world. In many Spanish-speaking countries of Latin America, people greet each other with one kiss on the cheek, for example in Argentina. In Colombia, shaking hands or verbal greeting is common and probably without hugging. In Peru and Spain, when men greet one another, they usually do so shaking hands or with a verbal greeting, otherwise, whenever a woman is involved, greeting involves kissing on the cheek or verbal greeting. In Brazil, kisses when greeting women can vary from one to three, and be fake (kissing the air) or on the cheek; men can salute by shaking hands or demonstrate comraderie by slapping one another’s shoulders or backs.
In the United States, the main form of greeting is shaking hands, though when greeting friends it is not uncommon for them to hug.