·- A series of strata in the lower Silurian formations of Great Britain;
— so named from Llandeilo in Southern Wales. ·see Chart of Geology.
·noun An assemblage of objects in a certain order or relation, or having some resemblance or common ...
Webster's Dictionary of the English Language
A set of islands not ranged in a row so as to form a chain, and the word is often used synonymously ...
The Sailor's Word-Book
·- A subdivision of the cretaceous formation of western North America, especially developed in Color...
·add. ·- A group of artificial dyes with an affinity for vegetable fibers, so that no mordant is req...
·- A subdivision at the base of the cretaceous formation in Western North America; — so named from ...
·- A minor subdivision at the base of the Cambrian system in Wales. ...
·- An extensive series of strata, principally developed in the Rocky Mountain region, as in the Lara...
·- A subdivision of the British Upper Silurian lying below the Old Red Sandstone; — so named from t...
·- A subdivision of the Chemung period in American geology. ·see Chart of Geology. ...
·- A subdivision of the Primordial or Cambrian period in American geology; — so named from the sand...
·- The middle of the three groups into which the rocks of the Canadian period have been divided in t...
·- The middle subdivision of the Upper Silurian in Great Britain; — so named from the typical local...