Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prae-călĕfactus and prae-cal-factus, a, um, Part. [calefacio], warmed very much, heated (post-class.): prae-calefacta apponere, Cael. Aur. Acut. 1, 17, 169; Scrib. Comp. 156: cera praecalfacta, id. ib. 238.