| Term | Definition |
| foramen | round or oval opening through a bone (hole) |
| fossa | shallow, basinlike depression in a bone, often serving as an articular surface (base of skull) |
| sulcus/groove | furrow (side of mandible, hole w/ trench) |
| meatus | canal-like passageway (auditory canal) |
| fissure | narrow, slitlike opening (inferior orbital fissure) |
| sinus | space within a bone, filled with air and lined w/ mucuous membrane (sinuses) |
| condyle | rounded articular projections (dorsal tips of jawbone) |
| tuberosity | large rounded projection, may be roughened (below joint below patella) |
| tubercle | small rounded projection or process (ball at femur) |
| trochanter | very large, blunt, irregularly shaped process (only examples are on the femur) |
| head | bony expansion carried on a narrow neck (narrowing of rib bone) |
| crest | narrow ridge of bone, usually prominent (shin) |
| spine | sharp, slender, often pointed projection (dorsal process on vertebrae) |
| epicondyle | raised area on or above a condyle (bump on balls of femur) |
| line | narrow ridge of bone, less prominent than a crest (superior femur below articulating ball) |
| ramus | armlike bar of bone (jawbone behind teeth) |