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Webster 1828 Edition

Adj.

[Gr. light, and to generate.] Generating light. Phosgene gas is generated by the action of light on chlorin and carbonic oxyd gas.

See also: phosgène

phosgene ‎(usually uncountable, plural phosgenes)

(inorganic chemistry) carbonyl chloride
- 2006, Thomas Pynchon, Against the Day, Vintage 2007, p. 265:
  “‘Poison gas’?” A new one on Lew. But Dr. De Bottle had taken on a somber look. “Phosgene.”