Stenotaphrum secundatum ste·no·taph·rumsecundatum uncommon noun 1. low mat-forming grass of southern United States and tropical America; grown as a lawn grass SynonymsSt. Augustine grassStenotaphrum secundatumbuffalo grass Related words Broader terms grass Parts Stenotaphrum WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.