1. トリュフに似た、地中に皮が硬い子実体ができるニセショウロ属の様々な菌類(any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles)
2. 地中に子実体をもつトリュフに似た様々なショウロ科の菌類(any of various fungi of the family Rhizopogonaceae having subterranean fruiting bodies similar to the truffle)