WordReference Random House Unabridged Dictionary of American English © 2026
di•phos•gene
(dī fos′jēn),USA pronunciation n. [Chem.]
- Chemistrya colorless liquid, C2Cl4O2, usually derived from methyl formate or methyl chloroformate by chlorination: a World War I poison gas now used chiefly in organic synthesis. Also called trichloromethyl chloroformate.
- di-1 + phosgene 1920–25
'diphosgene' also found in these entries (note: many are not synonyms or translations):