ursaceus Save DMLBS ursaceus [CL ursus+-aceus], ~ius, (in gl.) of or pertaining to bears. b (as sb. m.) bear-keeper. ursus ‥ unde ‥ ursinus ‥ quod etiam ~ius dicitur Osb. Glouc. Deriv. 612. b ~ius, ursarius, ursi custos Osb. Glouc. Deriv. 625.