a mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation.
the symbol r in Figure 5 represents a gene which is ineffective
同义词：
signcharactermarkletterhieroglyphideogram
2
a thing that represents or stands for something else, especially a material object representing something abstract.
the limousine was another symbol of his wealth and authority
