genus Malvaviscus ge·nus·mal·vaviscus uncommon noun 1. small genus of shrubs of Central and South America: wax mallows SynonymsMalvaviscusgenus Malvaviscus Related words Broader terms dilleniid dicot genus Parts Malvaceae Part of waxmallow WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.