Tournaisian

T1O1U1R1N1A1I1S1I1A1N1

proper noun

In the ICS geologic timescale, the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. It lasted from 358.9 Ma to 346.7 Ma and was preceded by the Famennian and followed by the Viséan.

Scrabble 11
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

proper noun
  1. geographyIn the ICS geologic timescale, the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. It lasted from 358.9 Ma to 346.7 Ma and was preceded by the Famennian and followed by the Viséan.

Origin

Named after the Belgian city of Tournai.

Full word history & related roots →
Cite this entry
APA

Tournaisian. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Tournaisian

MLA

“Tournaisian.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Tournaisian. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Tournaisian,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Tournaisian.

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