noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A sentence or inscription whose letters, when interpreted according to a system (such as Roman numerals) in which letters correspond to numeric values, stand for a particular date (usually the date of inscription) when rearranged.
2. 2
   A phylogenetic tree that has branch spans proportional to evolutionary time.

Synonyms

All synonyms

calendar

Etymology

From chrono- + -gram, from Ancient Greek χρόνος (khrónos, “time”) + γράμμα (grámma, “writing”).

Related phrases

roman numerals

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.