chro·no·gram /ˈkrɑnəˌgræm, ˈkro-/
  紀年銘
  Chron·o·gram n.
  1. 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.
  2. The record or inscription made by a chronograph.
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