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three-ridge

noun
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Definition of three-ridge

: a freshwater clam (Amblema costata synonym Quadrula plicata) of the Mississippi drainage system

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History and Etymology for three-ridge

so called from the three ridges on the shell

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“Three-ridge.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/three-ridge. Accessed 16 Feb. 2020.

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