Bone marking types

Foramen

Round hole for vessels and nerves (pl., foramina)

Condyle

Rounded bump; usually fits into a fossa on another bone to form a joint

Line

Similar to a crest but not raised as much (is often rather faint)

Spine

Similar to a crest but raised more; a sharp, pointed process; for muscle attachment

Body

The main portion of a bone

Meatus

Tubelike opening or channel (pl., meatus or meatuses)

Notch

A V-like depression in the margin or edge of a flat area

Angle

A corner

Neck

A narrowed portion, usually at the base of a head

Process

A raised area or projection

Epicondyle

Bump near a condyle; often gives the appearance of a "bump on a bump"; for muscle attachment

Sinus

Cavity within a bone

Ramus

Curved portion of a bone, like a ram's horn (pl., rami)

Fossa

Depression; often receives an articulating bone (pl., fossae)

Head

Distinct epiphysis on a long bone, separated from the shaft by a narrowed portion (or neck)

Margin

Edge of a flat bone or flat portion of the edge of a flat area

Facet

Flat surface that forms a joint with another facet or flat bone

Sulcus

Groove or elongated depression (pl., sulci)

Trochanter

Large bump for muscle attachment (larger than a tubercle or tuberosity)

Fissure

Long, cracklike hole for blood vessels and nerves

Crest

Moderately raised ridge; generally a site for muscle attachment

Tuberosity

Oblong, raised bump, usually for muscle attachment; also called a tuber; a small tuberosity is called a tubercle