carbuncle
From Longman Dictionary of Contemporary EnglishRelated topics: Illness & disability, Jewellerycarbunclecar‧bun‧cle /ˈkɑːbʌŋkəl $ ˈkɑːr-/ noun [countable] 1 MIa large painful lump under someone’s skin2 DCJa red jewel, especially a garnetExamples from the Corpuscarbuncle• Yet they were covered in carbuncles and boils.• This can be seen in the liquified, dead centre of the carbuncle.• A heap of bones, a wrecked carbuncle.Origin carbuncle (1200-1300) Old French Latin carbunculus “small piece of burning coal”, from carbo; → CARBON