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British Dictionary definitions for saint george's mushroom

Saint George's mushroom

noun
  1. an edible whitish basidiomycetous fungus, Tricholoma gambosum, with a floury smell

Word Origin

so named because it appears earlier than most fungi, around St George's day (23 April)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012