Helvellaceae hel·vel·la·ceae uncommon noun 1. family of false morels or lorchels; some are edible and some are poisonous Synonymsfamily Helvellaceae Related words Broader terms fungus family Parts Pezizales Part of Morchellafalse morellorchelgenus Helvellagenus Discinagenus Gyromitra WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.