Final answer:
The vocabulary used to encode laboratory orders and results is commonly referred to as LOINC.
Step-by-step explanation:
In the field of health care, the vocabulary used to encode laboratory orders and results is commonly referred to as LOINC (Logical Observation Identifiers Names and Codes). LOINC is a standardized system that provides universally recognized codes and names for laboratory tests and clinical observations. It helps in the exchange and sharing of laboratory data across different health care systems and allows for accurate interpretation and comparison of results.