Coprinus comatus cop·ri·nus·comatus uncommon noun 1. common edible mushroom having an elongated shaggy white cap and black spores Synonymsshaggymaneshaggy capshaggymane mushroomCoprinus comatus Related words Broader terms agaric Parts Coprinus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.