Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
terrĕus, a, um, adj. [terra], of earth, earthen: terrea progenies duris caput extulit arvis, Verg. G. 2, 341 (al. ferrea, Rib.): fossa et terreus agger, a dam or dike of earth, Varr. R. R. 1, 14, 2: murus, id. L. L. 5, § 48 Müll.