Ruscus aculeatus rus·cu·sa·culeatus uncommon noun 1. shrub with stiff-pointed flattened stems resembling leaves (cladophylls); used for making brooms Synonymsbutcher's broomRuscus aculeatus Related words Broader terms shrub Parts Ruscus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.