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p-aminobenzoic acid(PAB) (PABA) [ah-me″no-ben-zo´ik]
a substance required for the synthesis of folic acid by many organisms; it is included in the B vitamin complex, although it is not an essential nutrient for humans. It is synthesized by many bacteria; sulfonamides act by blocking its synthesis; it also absorbs ultraviolet light, specifically UVB rays, and is used as aminobenzoic acid as a topical sunscreen.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
para-aminobenzoic acid(păr′ə-ə-mē′nō-bĕn-zō′ĭk, -ăm′ə-)
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.