Foramen

In anatomy, a foramen is any opening.

Skull
See Foramina of skull

Other

 * the apical foramen is the hole at the tip of the root of a tooth.
 * the foramen ovale (heart) is a hole between the venous and arterial sides of the fetal heart.
 * the foramen transversarium is one of a pair of openings in each cervical vertebra, in which the vertebral artery travels.
 * vertebral foramen
 * obturator foramen
 * lesser sciatic foramen
 * greater sciatic foramen

An opening of the bone ( Vertebral Column )