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Noun: Silurian period
  1. The period from 425 million to 405 million years ago; characterized by the first air-breathing animals
    - Silurian

Type of: geological period, period

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

Encyclopedia: Silurian period

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