para-aminobenzoic acid

[ par-uh-uh-mee-noh-ben-zoh-ik, -am-uh-noh- ]

noun

, Chemistry, Biochemistry.

1. part of the folic acid molecule, a white or yellowish, crystalline, slightly water-soluble solid, C 7 H 7 NO 2 , the para isomer of aminobenzoic acid: used chiefly in the manufacture of dyes and pharmaceuticals and in sunscreens to protect against ultraviolet light. : PABA

para-aminobenzoic acid

noun

1. biochem an acid present in yeast and liver: used in the manufacture of dyes and pharmaceuticals. Formula: C 6 H 4 (NH 2 )COOH

para-aminobenzoic acid

/ păr′ə-ə-mē′nō-bĕn-zō′ĭk,-ăm′ə- /

1. See PABA

Word History and Origins

Origin of para-aminobenzoic acid¹

First recorded in 1905–10; para- ¹ + amino- + benzoic acid

Example Sentences

Look for a brand that has no fragrance and doesn’t contain zinc oxide or para-aminobenzoic acid; dogs often lick sunscreen off their skin, and both ingredients are toxic.

From Seattle Times

Others less sensitive may use a para-aminobenzoic acid preparation, which will pass rays to provide a safe tan.

From Time Magazine Archive

Most complex of all are the vitamins B. In learned papers last week scientists discussed examples of vitamin B activity: > Para-aminobenzoic acid reputedly turns grey hair dark again�but it raises blood pressure and, if sulfa drugs are given, it combats their curative powers.

From Time Magazine Archive