An inscription in which certain numeral letters, made to appear specially conspicuous, on being added together, express a particular date or epoch, as in the motto of a medal struck by Gustavus Adolphus in 1632: ChrIstVs DVX; ergo trIVMphVs.- the capitals of which give, when added as numerals, the sum 1632.

The record or inscription made by a chronograph.

a date (chrono) hidden in some written message (gram)

a date given in a disguised form - most often one in which the numerical value of the letters (in the abjad letter-number system) forming the title (or a phrase), when added together, produce a date

a sentence or inscription in which the capital letters, interpreted in Roman numerals, stand for a particular date if rearranged