Ideogram
"No Dogs!" sign in Spain. The dog illustration is a Pictogram. The red circle and bar is an Ideogram representing the idea of "no" or "not allowed".
An ideogram or ideograph is a graphical symbol that represents an idea or concept. Some ideograms can be understood because they resemble an image; they are known as Pictograms. Others rely on convention to be understandable.
Ideogram Media
Ideograms in the Church of the Visitation, Jerusalem. Five of the symbols are pictograms augmented with red bars representing the idea of "no" or "not allowed". The symbol at bottom left is a pictogram conveying the meaning of "silence".
Dongba symbols, used by the Naxi people as a mnemonic in reciting oral literature
Comparative evolution of Cuneiform, Egyptian and Chinese characters
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