We don't have synonyms for picric acids yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are picric acid, citric acids and nitric acids.
(n) :
(organic chemistry) 2,4,6-trinitrophenol, C₆H₂(NO₂)₃, prepared by the nitration of phenol or of aspirin; a toxic, yellow, explosive substance used in dyes, explosives, and as an antiseptic
(n) :
(organic chemistry) 2,4,6-trinitrophenol, C₆H₂(NO₂)₃, prepared by the nitration of phenol or of aspirin; a toxic, yellow, explosive substance used in dyes, explosives, and as an antiseptic