The Collaborative International Dictionary
Chondritis
Chondritis \Chon*dri"tis\, n. [NL., fr. Gr. ? cartilage + -itis.] (Med.) An inflammation of cartilage.
Wiktionary
chondritis
n. (context medicine English) inflammation of the cartilage
Wikipedia
Chondritis
Chondritis is inflammation of cartilage.
It takes several forms, osteochondritis, costochondritis, Relapsing polychondritis among them. Costochondritis is notable for feeling like a heart attack.