Definition of para-aminobenzoic acid - NCI Dictionary of Cancer Terms

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para-aminobenzoic acid (PAYR-uh-uh-MEE-noh-ben-ZOH-ik A-sid)

A nutrient in the vitamin B complex that the body needs in small amounts to function and stay healthy. Bacteria that live in the intestines need para-aminobenzoic acid to survive. Para-aminobenzoic acid is found in grains and foods from animals. It is being studied as a radiosensitizer (a substance that makes tumor cells more sensitive to radiation therapy) and in the treatment of certain skin disorders. Also called aminobenzoic acid and PABA.

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