onnian

Fetched 2026-10-26 (cache).

Synonyms: donnian

Antonyms: donnian

Related words from Datamuse; suggestions, not definitions.

Proper noun

1. {{lb|en|geology}} An [[age]] from 453 to 449 million years ago, a subdivision of the [[Ordovician]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.