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(), n.[F.] (Bot.) A genus of alg. The plants are composed of moniliform cells imbedded in a gelatinous substance. Nostoc commune is found on the ground, and is ordinarily not seen; but after a rain it swells up into a conspicuous jellylike mass, whish was formerly supposed to have fallen from the sky, whence the popular names, fallen star and star jelly. Also called witches' butter. スポンサード リンク
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