Final answer:
The term for a radiographic contrast study of the salivary glands and ducts is sialography.
Step-by-step explanation:
The term that refers to a radiographic contrast study of the salivary glands and ducts is called sialography.
Sialography is a diagnostic procedure that involves the injection of a contrast agent into the salivary ducts to visualize their anatomy and detect any abnormalities. This imaging technique helps in evaluating conditions such as salivary duct stones, strictures, and tumors.