1. A term applied to the fossiliferous strata below the old red sandstone.

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

• sibirian,
• sibarian,
• silvian,
• sirian,
• silution,
• soluriam,
• dilluvian,
• gilburtian,
• sulurian,
• silourian,
• silurioan,
• silurrian,
• sylurian,
• silurien,
• siluried,
• silurida,
• silurrus,
• seljukian,
• Violuria,
• piluria

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

The plural form of the word "Silurian" is "Silurians".

The singular form of the word "silurian" is "Silurian".