scouring rush scou·ring·rush uncommon noun 1. evergreen erect horsetail with rough-edged stems; formerly used for scouring utensils Synonymsscouring rushrough horsetailEquisetum hyemaleEquisetum hyemale robustumEquisetum robustum Related words Broader terms horsetail WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
