What's the noun for cartiliginous? Here's the word you're looking for.
cartilage
(anatomy) A type of dense, non-vascular connective tissue, usually found at the end of joints, the rib cage, the ear, the nose, in the throat and between intervertebral disks.
“And Birmingham City keeper Colin Doyle will also miss the two games in Portugal tomorrow and Monday after suffering a cartilege tear in his knee.”
“Steve Jones remains sidelined with a cartilege problem in his knee.”
“Scientists at the Laboratory for Tissue Engineering and Organ Fabrication at Massachusetts General Hospital have used a titanium frame to regrow ears from sheep cartilege.”