Definition of PETN
: a crystalline ester C5H8N4O12 used as a powerful high explosive and medically in the treatment of angina pectoris … the experts determined that its explosive content was identical to that of the Honolulu bomb—PETN, an explosive undetectable by X-ray. — Steven Emerson —called also pentaerythritol tetranitrate
Explore Merriam-Webster
Origin and Etymology of petn
pentaerythritol tetranitrate
First Known Use: 1944
Seen and Heard
What made you want to look up PETN? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!