Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
caldor, ōris, m. [caldus = calidus], warmth, heat (ante- and post-class.), Varr. R. R. 3, 9, 15; 1, 41, 1; 1, 55, 6; Gell. 17, 8, 10; 19, 4, 4 and 5; Arn. 7, 240.