Bone Markings

Foramen

Round or oval opening through a bone

Fissure

Narrow, slitlike opening.

Groove

Furrow

Fossa

Shallow, basinlike depression in a bone, often serving as an articular surface

Meatus

Canal-like passageway

Sinus

Space within a bone, filled with air and lined with mucous membrane

Ramus

Arm-like bar of bone

Condyle

Rounded articular projection

Facet

Smooth, nearly flat articular surface

Head

Bony expansion carried on a narrow neck

Process

Prominence or projection

Spine

Sharp, slender, often pointed projection

Epicondyle

Raised area on or above a condyle

Tubercle

Small rounded projection or process

Line

Narrow ridge of bone; Less prominent than a crest

Trochanter

Very large, blunt, irregularly shaped process.

Crest

Narrow ridge of bone; usually prominent

Tuberosity

Large rounded projection; May be roughened.