Origins
The word 'cartilage' entered English in the early fifteenth century from French 'cartilage,' which came from Latin 'cartilāgō' (genitive 'cartilāginis'), meaning 'gristle' or 'cartilage.' The deeper etymology of the Latin word is uncertain. One proposal links it to Latin 'crātis' (wickerwork, a woven hurdle), from PIE *kert- (to twist, to weave), suggesting that cartilage was named for its woven, fibrous internal structure. Another proposal, less widely accepted, connects it to a root meaning 'hard.' The uncertainty reflects the general difficulty of tracing Latin medical terminology to PIE roots — many such terms may be borrowings from pre-Latin Italic languages or from Etruscan.
The native English equivalent of 'cartilage' is 'gristle' — from Old English 'gristl' (cartilage, gristle), of uncertain further etymology but clearly Germanic. 'Gristle' remains the common word in everyday speech ('the gristle on a pork chop'), while 'cartilage' is the anatomical and medical term ('torn cartilage in the knee'). This Latin/Germanic doublet pattern — technical term from Latin, everyday word from Germanic — is one of the most characteristic features of English vocabulary.
Cartilage is a unique connective tissue: firmer than muscle or fat, but more flexible than bone. It contains no blood vessels (it is avascular) and no nerves, which is why cartilage injuries heal slowly — nutrients must diffuse in from surrounding tissues rather than being delivered by blood supply. There are three types: hyaline cartilage (smooth and glassy, found in joints, the trachea, and the nose), elastic cartilage (flexible and resilient, found in the ear and epiglottis), and fibrocartilage (tough and dense, found in intervertebral discs and the meniscus of the knee).
Scientific Usage
In embryonic development, much of the skeleton begins as cartilage and is gradually replaced by bone through a process called endochondral ossification. The growth plates (epiphyseal plates) in children's bones are cartilage zones where new bone growth occurs. When the growth plates ossify (close) at the end of puberty, longitudinal bone growth stops. This is why cartilage-related injuries in children — especially those affecting growth plates — require careful medical attention.
The nose and ears are largely cartilaginous, which is why they remain flexible throughout life. (The common belief that ears and noses 'keep growing' in old age is not quite accurate: the cartilage does not grow, but gravity gradually stretches it, and the loss of skin elasticity makes these structures appear larger.) The larynx (voice box) is also a cartilaginous structure — the 'Adam's apple' is the thyroid cartilage.
In sports medicine, cartilage injuries are among the most common and most debilitating. The meniscus — a C-shaped piece of fibrocartilage in the knee joint — is frequently torn in sports involving twisting movements. Articular cartilage — the smooth coating on bone surfaces within joints — wears away in osteoarthritis, causing pain, stiffness, and eventual joint failure. Because cartilage has no blood supply, it cannot repair itself effectively, making cartilage damage essentially permanent without surgical intervention.
Greek Origins
The adjective 'cartilaginous' — meaning 'made of or resembling cartilage' — is used both anatomically and in zoological classification. The class Chondrichthyes ('cartilage-fish,' from Greek 'chóndros,' cartilage, + 'ichthýs,' fish) includes all sharks, rays, and skates — animals whose entire skeletons are made of cartilage rather than bone.