a smooth, edible, large white-capped mushroom, Agaricus arvensis, that has the odor of anise, common in North American meadows and fields.
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How to use horse mushroom in a sentence
It has acquired in England the name of horse mushroom, from the enormous size it sometimes attains.Fungi: Their Nature and Uses | Mordecai Cubitt Cooke
The large horse-mushroom, except for catsup, should be very cautiously eaten.
The horse mushroom has pink gills and may be found from June to September.The Mushroom, Edible and Otherwise | M. E. Hard
British Dictionary definitions for horse mushroom
a large edible agaricaceous field mushroom, Agaricus arvensis, with a white cap and greyish gills
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