R / rŭbĭa
noun

rŭbĭa

gen. rŭbiae · gender feminine · decl. 1st
madder
madder, Plin. 19, 3, 17, § 47: quam aliqui ereuthodanum vocant, id. 24, 11, 56, § 94; 35, 6, 26, § 45; Vitr. 7, 14.