1. Abounding in chalk

1. From 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
   - Cretaceous period

1. Of or relating to or denoting the third period of the Mesozoic era

See also: chalk

Type of: geological period, period

Part of: Age of Reptiles, Mesozoic, Mesozoic era

Encyclopedia: Cretaceous

• Atakapan
• ataman
• atar
• ataractic
• ataractic agent
• ataractic drug
• Atarax
• ataraxia
• ataraxic
• ataraxis
• ataraxy
• Ataturk
• atavism
• atavist
• atavistic
• ataxia
• ataxic
• ataxic abasia
• ataxic aphasia
• ataxy
• Atayalic
• Ate
• atelectasis
• ateleiosis
• ateleiotic