Learn how to say Phosgene correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word phosgene:
[mass noun] Chemistry
a colourless poisonous gas made by the reaction of chlorine and carbon dioxide. It was used as a poison gas, notably in the First World War.
Alternative name: carbonyl chloride; chemical formula: COCl2
early 19th century: from Greek phōs ‘light’ + -gen, with reference to its original production by the action of sunlight on chlorine and carbon monoxide