Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† cătăphractes or -ta, ae, m., = καταφρακτής, a coat of mail furnished with iron scales, Tac. H. 1, 79; Veg. Mil. 1, 20; acc. cataphracten, Tert. Pall. 4.