Technology / Television (TV) / Icon: Generally speaking, an object that represents a theme or an aspect of the character or the like. In the specific context of semiotics, a type of sign, wherein the signifier physically resembles the signified. For example, a photograph (signifier) is a mechanical reproduction of what is photographed (signified).
Entertainment / Literature / Lexicon: In an over-simplified sense, we might say lexicon is a fancy term scholars use when most people would simply say dictionary, i.e., a complete list of words and their definitions. To be more accurate, MORE
Business / Internet Marketing / favicon : A small icon that is used by some browsers to identify a bookmarked Web site. MORE