Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
argentī-fŏdīna (also written separately, argentī fŏdīna), ae, f. [argentum], a silver-mine, Varr. L. L. 8, § 62; Vitr. 7, 7 al.: Odor ex argenti fodinis inimicus omnibus animalibus, sed maxume canibus, Plin. 33, 6, 31, § 98; Varr. R. R. 1, 2, 22.