1. A small projection or outgrowth from a bone or other anatomical structure.
Usage: anatomy; medical
2. In geology, a small branch or offshoot of an igneous rock formation or vein.
Usage: geology; technical

Examples

• The apophysis of the vertebra serves as an attachment point for muscles.
• Doctors examined the small apophysis on the patient's shoulder blade.
• The apophysis of the granite vein extended into the surrounding rock.
• In skeletal anatomy, each apophysis develops from a separate ossification center.
• The geologist identified an apophysis branching off from the main mineral deposit.