12-Letter Words That Start With: OS

• electronic equipment that provides visual images of varying electrical quantities

• 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

• extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic

• therapy based on the assumption that restoring health is best accomplished by manipulating the skeleton and muscles

• the recording produced by an oscillograph

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