13-Letter Words Starting: OS

• a device for making a record of the wave forms of fluctuating voltages or currents

• electronic equipment that provides visual images of varying electrical quantities

• an inflammation of bone and bone marrow (usually caused by bacterial infection)

• the developmental process of bone formation

• the calcification of soft tissue into a bonelike material

• the process of becoming rigidly fixed in a conventional pattern of thought or behavior

• hardened conventionality

• abnormal softening of bones caused by deficiencies of phosphorus or calcium or vitamin D

• malignant bone tumor; most common in children and young adults where it tends to affect the femur