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grass sponge

noun
1.
a large, dark brown, commercial sponge, Spongia graminea, of Florida, the West Indies, and the Gulf of Mexico.
Origin of grass sponge
1870-1875
An Americanism dating back to 1870-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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6
7
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