Onnian

O1N1N1I1A1N1

proper noun

An age from 453 to 449 million years ago, a subdivision of the Ordovician.

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Meanings

proper nounthe Onnian
  1. geographyAn age from 453 to 449 million years ago, a subdivision of the Ordovician.
Cite this entry
APA

Onnian. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Onnian

MLA

“Onnian.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Onnian. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “Onnian,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Onnian.

Source: Onnian on Wiktionary, CC BY-SA 4.0.