Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: Silurian  sI'lur-ee-un
  1. From 425 million to 405 million years ago; first air-breathing animals
    - Silurian period

Derived forms: Silurians

Type of: geological period, period

Part of: Palaeozoic [Brit, Cdn], Paleozoic, Paleozoic era

Encyclopedia: Silurian