Vertebra T9
Bones · Latin: Vertebra thoracis IX
NINTH THORACIC VERTEBRA
The ninth thoracic vertebra may have no demi-facets below.
In some subjects however, it has two demi-facets on either side; when this occurs the tenth doesn't have facets but demi-facets at the upper part.
The thoracic spinal nerve 9 (T9) passes out underneath it.
The xiphisternum (or xiphoid process of the sternum) is at the same level in the axial plane.
See: thoracic vertebrae.
Definition from Wikipedia, CC BY-SA 4.0.