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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

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silly billy
silly season
silo
siloxane
Silphium
Silphium laciniatum
silt
silt up
siltstone
silty
Silurian
Silurian period
silurid
silurid fish
Siluridae
siluriform fish
Siluriformes
Silurus
Silurus glanis
silva
silvan