1. The lowest of the three divisions of the Jurassic period; a name given in England and Europe to a series of marine limestones underlying the Oolite

Encyclopedia: Lias Lias, Gers

• upturn
• upturned
• Upupa
• Upupa epops
• Upupidae
• upward
• upwardly
• upwardly mobile
• upwards
• upwelling
• upwind
• Ur
• uracil
• uraemia
• uraemic
• uraeus
• Ural
• Ural Mountains
• Ural-Altaic
• Uralic
• Uralic language
• Urals
• uranalysis
• Urania
• Uranian