Pronunciation: (par'u-u-mē"nō-ben-zō'ik, -am"u-nō-), [key] Chem., Biochem.
part of the folic acid molecule, a white or yellowish, crystalline, slightly water-soluble solid, C7H7NO2, the para isomer of aminobenzoic acid: used chiefly in the manufacture of dyes and pharmaceuticals and in sunscreens to protect against ultraviolet light. Abbr.: PABA
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.