nalidixic acid

[ ney-li-dik-sik, ney- ]
/ ˈneɪ lɪˈdɪk sɪk, ˌneɪ- /

noun Pharmacology.

a substance, C12H12N2O3, that has antibacterial activity against many susceptible Gram-negative organisms, especially used in the treatment of urinary tract infections.

Origin of nalidixic acid

1960–65; by shortening and rearrangement of naphthyridine and carboxylic acid, components of its chemical name Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for nalidixic acid

nalidixic acid
[ nā′lĭ-dĭksĭk ]


A compound used in the treatment of infections of the genital and urinary tracts caused by gram-negative bacteria.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.