(organic chemistry) An organophosphate insecticide, [(dethoxyphosphinothioylthio)methylthio]-diethoxy-thioxophosphorane, that is known to neutralise the neural enzyme acetylcholinesterase.

(organic chemistry) Relating to ethionic acid and its derivatives

(organic chemistry) The unstable sulfonic acid 2-sulfooxyethanesulfonic acid

plural of ethionine

(biochemistry) A toxic and carcinogenic non-proteinogenic amino acid structurally related to methionine, with an ethyl group in place of the methyl group.

plural of ethionamide

(pharmacology) An antibiotic prodrug C₈H₁₀N₂S effective only against mycobacteria and used in the treatment of tuberculosis and leprosy.