What does coracoid mean?
The coracoid is a hook- or crow's-beak-shaped element of the pectoral (shoulder) girdle found in birds, reptiles, amphibians, and many other vertebrates. In these animals it is a distinct bone that helps brace and stabilise the forelimb — in flying birds it works as a strut between the sternum and the humerus, absorbing the stresses of flight. Mammals, including humans, do not possess a separate coracoid bone; instead its equivalent survives as a small hooked projection on the scapula called the coracoid process, which serves as an attachment point for muscles and ligaments around the shoulder. The word derives from Greek korax, meaning 'raven', combined with the suffix -oid ('resembling'), a reference to the structure's curved, beak-like shape. Coracoid appears chiefly in anatomy, zoology, palaeontology, and orthopaedics, and is rarely encountered outside technical writing, though injuries to the coracoid process are discussed in sports medicine.
nounA hook-shaped bone in the pectoral girdle of most vertebrates other than mammals; in humans it exists only as the coracoid process of the scapula.
- (Anatomy & zoology) A hook-shaped bone forming part of the pectoral girdle in birds, reptiles, amphibians, and other non-mammalian vertebrates.
- (Anatomy, attributive) Relating to the coracoid process of the scapula in humans, as in 'coracoid process' or 'coracoid fracture'.
"The surgeon anchored the ligament to the coracoid to restore shoulder stability."
"In birds, the coracoid acts as a strut bracing the wing against the sternum during flight."
"An MRI revealed an avulsion fracture of the coracoid process following the fall."
Regular plural; typically used when discussing paired bones across animals or multiple specimens.
"Both coracoids were preserved intact in the fossil skeleton."
Named after a raven's beak, the coracoid is the reason your collarbone and shoulder blade can team up at all.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of coracoid
Coracoid comes from the Greek korax, meaning 'raven' or 'crow', joined to the suffix -oid, meaning 'resembling' — so the word literally means 'raven-like', a nod to the bone's curved, beak-shaped form. The same Greek root korax also underlies the Latin corvus ('crow'), which gives English words such as corvid and corvine. The term entered scientific Latin and then English usage in the early modern period as comparative anatomy developed.
How coracoid is actually used
A technical term used almost exclusively in anatomy, zoology, palaeontology, and orthopaedic medicine; rare in general conversation. In human anatomy the word usually appears as part of the fixed phrase 'coracoid process', since humans lack a separate coracoid bone.
Easily confused with coracoid
The coronoid process is a different anatomical projection (of the mandible and ulna), whereas the coracoid relates to the raven-shaped structure of the shoulder girdle.