For p-aminobenzoic acid (PABA) we have a term and definition in Microbiology.

A factor in the vitamin B complex, a part of all folic acids and required for its formation; neutralizes the bacteriostatic effects of the sulfonamides since it furnishes an essential growth factor for bacteria, the utilization with which the sulfonimides interfere; used as an ultraviolet screen in lotions and creams.
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