butterfly clam

noun

variants or butterfly mussel
: a freshwater mussel (Plagiola securis) found in the Ohio and Illinois rivers and reported to produce pearls of fine quality

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Cite this Entry

“Butterfly clam.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/butterfly%20clam. Accessed 30 Sep. 2022.

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