| Fissure | A slit like opening |
| Groove or Sulcus | Narrow groove |
| Foramen | Opening for vessels, nerves or tendons |
| Meatus (canal) | Passageway through bone |
| Sinus | Cavity |
| Fossa | Depression |
| Fovea | A pit |
| Fontanel | Space between skull bones at birth; covered with connective tissue |
| Condyle | Large, smooth rounded articulating oval surface |
| Head | Prominent rounded epithysis |
| Facet | Small, flat, shallow articulating surface |
| Tubercle | Small rounded process |
| Trochanter | Large, blunt projection |
| Crest | Prominent border or ridge |
| Line | Less prominent border or ridge |
| Spinous process or spine | Pointed, slender process |
| Epicondyle | Projection - next to condyle |