The Collaborative International Dictionary of English v.0.48:
Carbuncular \Car*bun"cu*lar\, a. Belonging to a carbuncle; resembling a carbuncle; red; inflamed. [1913 Webster]WordNet (r) 3.0 (2006):
carbuncular adj 1: afflicted with or resembling a carbuncle [syn: carbuncled, carbuncular]