also ikon, 1570s, "image, figure, picture," also "statue," from Late Latin icon, from Greek eikon "likeness, image, portrait; image in a mirror; a semblance, phantom image;" in philosophy, "an image in the mind," related to eikenai "be like, look like," which is of uncertain origin. The specific Eastern Church sense is attested from 1833 in English. Computing sense first recorded 1982.
1650s, "of or pertaining to a portrait," from Late Latin iconicus, from Greek eikonikos "pertaining to an image," from eikon "likeness, image, portrait" (see icon). In art, applied to statues of victorious athletes, sovereigns, etc., 1801.
An emoticon is an emotional icon, or a pictorial representation of the emotions of the moment. These are most commonly created on one line using the symbols on the keyboard. Humor is often denoted with the smiley face :-) which is more obvious if you tilt your head to the left. ["Acronyms, Emoticons, and Lurkers," PC Magazine, August 1992]
"breaker or destroyer of images," 1590s, from French iconoclaste and directly from Medieval Latin iconoclastes, from Late Greek eikonoklastes, from eikon (genitive eikonos) "image" + klastes "breaker," from klas- past tense stem of klan "to break" (see clastic).
Originally in reference to those in the Eastern Church in 8c. and 9c. whose mobs of followers destroyed icons and other religious objects on the grounds that they were idols. Applied to 16c.-17c. Protestants in Netherlands who vandalized former Catholic churches on similar grounds. Extended sense of "one who attacks orthodox beliefs or cherished institutions" is first attested 1842.