Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ablātīvus, i, m. [aufero], with or without casus, the ablative case (as denoting that from which something is taken away), Quint. 1, 5, 59; 1, 7, 3; 1, 4, 26; 7, 9, 10 al.