1. Belonging to the old red sandstone system as found in Devonshire.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• devotian,
• devosion,
• aelonian,
• fevonian,
• deevonian,
• devonan,
• devonin,
• devonia,
• devonain,
• levonian,
• davonian,
• devonien,
• leconian,
• pevonia,
• bezionian,
• beezonian,
• bezoniian,
• lemonian,
• Lavinian,
• dimonian

• defining.

The adjective form of the word "Devonian" is "Devonian".

The plural form of the word "devonian" is "devonians".

The singular form of the word "devonian" is "Devonian".