Calymmian

adj, name

adj, name ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Denoting a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago. not-comparable
Proper Noun
  1. 1
    The Calymmian period.

Etymology

From Ancient Greek κάλυμμα (kálumma, “covering”).

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