genus Boletus ge·nus·bo·letus uncommon noun 1. type genus of Boletaceae; genus of soft early-decaying pore fungi; some poisonous and some edible SynonymsBoletusgenus Boletus Related words Broader terms fungus genus Parts Boletaceae Part of Boletus chrysenteronBoletus edulisFrost's boleteBoletus luridusBoletus mirabilisBoletus pallidusBoletus pulcherrimusBoletus pulverulentus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.