Delthyris limestone
Delthyris Del*thy"ris, n. [NL., fr. Gr. de`lta the name of the letter [Delta] + thy`ra door.] (Zo["o]l.) A name formerly given to certain Silurian brachiopod shells of the genus {Spirifer}. [1913 Webster]

{Delthyris limestone} (Geol.), one of the divisions of the Upper Silurian rocks in New York. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Delthyris — Del*thy ris, n. [NL., fr. Gr. de lta the name of the letter [Delta] + thy ra door.] (Zo[ o]l.) A name formerly given to certain Silurian brachiopod shells of the genus {Spirifer}. [1913 Webster] {Delthyris limestone} (Geol.), one of the divisions …   The Collaborative International Dictionary of English

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