| A | B |
|---|
| Tuberosity. | large, rounded projection; may be roughened |
| Crest. | Narrow ridge of bone; usually prominent. |
| Trochanter. | Very large, blunt, irregularly shaped process. |
| Line. | Narrow ridge of bone, less prominent than a crest. |
| Tubercle. | Small, rounded projection or process. |
| Epicondyle. | Raised area on or above the condyle. |
| Spine. | Sharp, slender, often pointed projection. |
| Process. | Any bone prominence. |
| Head. | Bony expansion carried on a narrow neck. |
| Facet. | Smooth, nearly flat articular surface. |
| Condyle. | Rounded articular projection. |
| Ramus. | Armlike bar of bone. |
| Meatus. | Canal-like passageway. |
| Sinus. | Cavity within a bone, filled with air and lined with mucous membrane. |
| Fossa. | Shallow, basinlike depression in a bone, often serving as an articular surface. |
| Groove. | Furrow. |
| Fissure. | Narrow, slit like opening. |
| Foramen. | Round or oval opening through a bone. |
