grass sponge

American  

noun

1. a large, dark brown, commercial sponge, Spongia graminea, of Florida, the West Indies, and the Gulf of Mexico.

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Etymology

Origin of grass sponge

An Americanism dating back to 1870–75

Example Sentences

They squeezed out of this grass sponge a calabash full of water, and George ran with it to the panting beast.

From It Is Never Too Late to Mend by Reade, Charles