Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
consīdĕrātĭo, ōnis, f. [considero, II.], contemplation, consideration, reflection (rare; not in Quint.): consideratio contemplatioque naturae, Cic. Ac. 2, 41, 127: accurata, id. ib. 2, 11, 36; id. Inv. 2, 33, 103: subtilior verborum, Gell. 13, 29 (28), 6.