Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ŭmĕrāle (not hŭ-; v. umerus), is, n. [umerus, II. B.], a covering for the shoulders, a (military) cape: si miles tibiale vel umerale alienavit, Dig. 49, 16, 14.