Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
suc-cinĕrīcius (subc-), a, um, adj. [sub-cinis], prepared under the ashes (late Lat.): panis, baked under the ashes, Vulg. Gen. 18, 6; id. Exod. 12, 39; id. Osee, 7, 8 al.; cf. Isid. Orig. 20, 21.