Looking for rheumatic disease types, treatments, and associated rheumatology definitions? From abatacept to WOMAC, learn about common terms related to arthritis and rheumatic and musculoskeletal diseases. Looking for information about MACRA? See MACRA terms and definitions.



Inflammation of a blood vessel (arteritis, phlebitis) or lymphatic vessel (lymphangitis).

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Any disease of the blood vessels.

Visual analog scale (VAS)

A measurement instrument that tries to measure a characteristic or attitude that is believed to range across a continuum of values and cannot easily be directly measured. For example, the amount of pain that a patient feels ranges across a continuum from none to an extreme amount of pain.

Vitamin D

Generic descriptor for all steroids exhibiting the biologic activity of ergocalciferol or cholecalciferol.

Vocational rehabilitation

Programs conducted by state vocational rehabilitation agencies operating under the U.S. Rehabilitation Act of 1973; services are intended to help people with disabilities to acquire, reacquire, and maintain employment.

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