名詞 carbuncle:

1. deep-red cabochon garnet cut without facets
2. an infection larger than a boil and with several openings for discharge of pus

car.bun.cle

n.（名詞）
A painful localized bacterial infection of the skin and subcutaneous tissue that usually has several openings through which pus is discharged.
癰，紅疹，紅斑：一種疼痛的局部皮膚和皮下組織的細(xì)菌感染，通常有讓膿流出來的一些口子

A deep-red garnet, unfaceted and convex.
紅榴石：一種深紅色的石榴石，無刻面呈凸圓狀
Obsolete A red precious stone.
【廢語】 紅玉：一種紅色寶石

來源：
Middle English
中古英語
from Old French
源自 古法語
from Latin carbunculus [small glowing ember, carbuncle]
源自 拉丁語 carbunculus [余火未盡的熾熱細(xì)小煤塊，棕紅的]
diminutive of carbô carbôn- [coal] * see ker- 3
carbô的小后綴 carbôn- [煤] *參見 ker- 3

【引伸】
car.bun.cled
adj.（形容詞）
carbun.cular