Which term refers to the groove above the acetabulum?

• A. Groove below the acetabulum
• B. Groove above the acetabulum
• C. Canal around the acetabulum
• D. Ridge above the acetabulum

Answer: (B)

Understanding how anatomical names describe location helps here. A groove is a shallow, elongated depression in bone, and when its position is specified relative to a landmark like the acetabulum, the description should state that relationship clearly. If the feature sits on the superior (above) side of the acetabulum, the natural label is a groove above the acetabulum (often referred to as a supraacetabular groove). This directly communicates both what the feature is and where it is.

Saying it is a groove below the acetabulum would place it on the inferior side, which isn’t the described location. A canal around the acetabulum would imply a tunnel encircling the socket, not a shallow groove. A ridge above the acetabulum would describe a raised border rather than a groove.