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• n  a piece of writing in code or cipher

• City buses winked with the company's cryptogram: an eye and a key followed by "ah!" The hoopla brought out 10,000 shoppers on the first day of the sale.
• Sir: There are four misprints in your cryptogram.
• In the cryptogram, it runs before N and never follows it; at the same time, it always follows H and never precedes it.

• cryptograph
• secret writing