genus Gyromitra ge·nus·gy·romitra uncommon noun 1. a genus of fungi of the family Helvellaceae with a fertile portion that is tan to brown Synonymsgenus Gyromitra Related words Broader terms fungus genus Parts Helvellaceae Part of Gyromitra californicaGyromitra sphaerosporaGyromitra esculentaGyromitra infulaGyromitra fastigiataGyromitra gigas WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.