mountain devil moun·tain·de·vil uncommon noun 1. erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar Synonymshoneyflowerhoney-flowermountain devilLambertia formosa 2. desert lizard that feeds on ants Synonymsmountain devilspiny lizardMoloch horridus Related words Broader terms molochshrub Parts genus MolochLambertia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.