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Related to carbuncled: carbuncular
1. A painful localized bacterial infection of the skin and subcutaneous tissue that usually has several openings through which pus is discharged.
a. A red precious stone, especially a deep-red garnet cut as a cabochon.
b. A mythical gemstone said to emit light even in total darkness.
[Middle English, from Old French, from Latin carbunculus, small glowing ember, carbuncle, diminutive of carbō, carbōn-, coal; see ker- in Indo-European roots.]
car·bun′cu·lar (-kyə-lər) adj.