The Collaborative International Dictionary of English v.0.48:
Exulceration \Ex*ul`cer*a"tion\, n. [L. exulceratio: cf. F.
exulc['e]ration.] [Obs. or R.]
1. Ulceration. --Quincy.
[1913 Webster]
2. A fretting; a festering; soreness. --Hooker.
[1913 Webster]