from the GNU version of the Collaborative International Dictionary of English
- A series of strata in the lower Silurian formations of Great Britain; -- so named from Llandeilo in Southern Wales. See Chart of geology.
from The Century Dictionary and Cyclopedia
- n. A division of the Lower Silurian, first described by Murchison as occurring at Llandeilo in Carmarthenshire, Wales, and also found in Pembrokeshire and Radnorshire.
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