Orthis definitions

Orthis

• (n.) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.
Found on http://thinkexist.com/dictionary/meaning/orthis/

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Orthis

Or'this (ôr'thĭs) noun [ New Latin , from Greek 'orqo`s straight.] (Zoology) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.
Found on http://www.encyclo.co.uk/webster/O/34

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