noun
a mass of green algae found in the intestines of certain animals
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Aegagropilae are clumps of algae that are commonly found in the stomachs of seabirds.
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I saw a bunch of aegagropilae washed up on the beach during low tide.
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Dude, check out those weird green blobs in the water - they look like aegagropilae or something.
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The cluttered desk resembled aegagropilae, with random papers and pens scattered everywhere.