/ ɪˈməʊtɪkɒn; NAmE ɪˈmoʊtɪkɑːn/ noun
( computing ) a short set of keyboard symbols that represents the expression on sb's face, used in email, etc. to show the feelings of the person sending the message. For example:-) represents a smiling face (when you look at it sideways).
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WORD ORIGIN
1990s: blend of emotion and icon .