emoticon
Concise Oxford English Dictionary © 2008 Oxford University Press:
emoticon /ɪˈməʊtɪkɒn, -ˈmɒtɪ-/
▶noun a representation of a facial expression such as a smile or frown, formed with keyboard characters and used in email and text messages to convey the writer's feelings.
'emoticon' also found in these Oxford entries:

