Tribulus terestris tri·bu·lus·terestris uncommon noun 1. tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed Synonymscaltropdevil's weedTribulus terestris Related words Broader terms subshrub Parts Tribulus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
