a. Obs. [ad. L. ærūginōsus, f. ærūgin-em: see prec.] Partaking of the nature or substance of verdigris, or of copper itself; resembling verdigris.
1646. Sir T. Browne, Pseud. Ep., VI. xii. 336. Artificiall copperose … is a rough and acrimonious kinde of salt drawn out of ferreous and eruginous earths.
1666. G. Harvey, Morb. Angl., xv. 72 (J.). Tertians … depending … upon an adust (burn’d) Stibial or Æruginous Sulphur.
