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Silurian (adj.)
1708, "pertaining to the Silures," from Latin Silures "ancient British tribe inhabiting southeast Wales." Geological sense is from 1835, coined by Sir Roderick Impey Murchison (1792-1871) because rocks of this period are especially frequent in Wales.
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Definitions of Silurian
Dictionary entries near Silurian
silly
silo
Siloam
silphium
silt
Silurian
silvan
silver
silver bullet
silver lining
silver screen