stone plant sto·nep·lant uncommon noun 1. any plant of the genus Lithops native to Africa having solitary yellow or white flowers and thick leaves that resemble stones Synonymslithopsliving stonestonefacestone-facestone plantstone life faceflowering stone Related words Broader terms succulent Parts genus Lithops WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
