Definition of Silurian

1. Noun. From 425 million to 405 million years ago; first air-breathing animals.

Exact synonyms: Silurian Period
Group relationships: Paleozoic, Paleozoic Era
Generic synonyms: Geological Period, Period

Definition of Silurian

1. a. Of or pertaining to the country of the ancient Silures; -- a term applied to the earliest of the Paleozoic eras, and also to the strata of the era, because most plainly developed in that country.

2. n. The Silurian age.

Definition of Silurian

1. of or pertaining to a certain geologic time period [adj]

Medical Definition of Silurian

1. Of or pertaining to the country of the ancient Silures; a term applied to the earliest of the Paleozoic eras, and also to the strata of the era, because most plainly developed in that country. The Silurian formation, so named by Murchison, is divided into the Upper Silurian and Lower Silurian. The lower part of the Lower Silurian, with some underlying beds, is now separated under the name Cambrian, first given by Sedwick. Recently the term Ordovician has been proposed for the Lower Silurian, leawing the original word to apply only to the Upper Silurian. Origin: From L. Silures, a people who anciently inhabited a part of England and Wales. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Silurian

silt
siltation
siltations
silted
Silteplase
siltier
siltiest
silting
silts
siltstone
siltstones
silty
silt up
silure
silurian (current term)
Silurian
Silurian period
silurid
Siluridae
siluridan
silurids
silurid fish
Siluriformes
siluriform fish
silurist
silurists
siluroid
siluroid
siluroidei
siluroids

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