chronogram noun. ['krɒnǝgram] E17.
[from CHRONO- + -GRAM.]
A phrase etc. of which the roman-numeral letters express a date when added together (e.g. LorD haVe MerCIe Vpon Vs =50+500+5+1000+100+1+5+5=1666).

■ chronogra'mmatic adjective of or pertaining to chronograms; of the nature of a chronogram: M18.

■ chronogra'mmatical adjective (now rare or obsolete) = chronogrammatic M17.

[TahlilGaran] English Dictionary ▲