What does acetabular mean?
"Acetabular" is a technical adjective used almost exclusively in anatomy and medicine to describe anything relating to the acetabulum — the deep, cup-shaped socket in the pelvis that receives the head of the thigh bone and together with it forms the hip joint. The term appears most often in orthopaedics and radiology, as in "acetabular fracture," "acetabular labrum" (the ring of cartilage rimming the socket), and "acetabular cup" (the artificial socket component of a hip replacement). Its origin reflects its shape: Latin acetabulum meant a small vinegar cup used at the dining table, and early anatomists borrowed the name for the similarly shaped pelvic cavity. Because it belongs to specialist vocabulary, readers will encounter "acetabular" mainly in medical reports, surgical literature, and discussions of hip injury or replacement surgery, where precision about this crucial weight-bearing joint matters greatly.
adjectiveRelating to the acetabulum, the cup-shaped socket of the hip bone that receives the head of the femur.
- Anatomy: relating to or situated in the acetabulum, the cup-shaped cavity of the pelvis that forms the hip joint with the femoral head.
"The surgeon repaired the torn acetabular labrum to restore stability to the patient's hip joint."
"Elderly patients who fall are at particular risk of an acetabular fracture, which may require surgical fixation."
"Radiographs revealed abnormal acetabular coverage of the femoral head, consistent with developmental dysplasia of the hip."
The word for your hip socket comes from the Latin for a little vinegar cup — because Roman diners dipped bread in small cups called acetabula, and anatomists thought the shape matched.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of acetabular
Acetabular derives from Latin acetabulum, meaning a small cup for vinegar (from acetum, "vinegar", related to acer, "sharp"), which anatomists applied to the cup-shaped hip socket. The English adjective formed from this noun describes structures pertaining to that socket. It shares its ultimate root with words such as acetic and acetate, all traceable to the sharp, sour quality expressed by the Latin acetum.
Related word forms
How acetabular is actually used
Strictly technical and medical in register; it appears almost exclusively in anatomy, orthopaedic surgery, radiology, and palaeontology rather than everyday language.
Easily confused with acetabular
Acetabulum is the noun naming the hip socket itself, while acetabular is the adjective describing anything relating to that socket.