Definition of Semtex in English:

Semtex

Syllabification: Sem·tex
Pronunciation: /ˈsemˌteks
 
/

noun

  • A very pliable, odorless plastic explosive.
    More example sentences
    • Three minutes later, the screener noticed that the explosive trace detection machine indicated a positive alert for Semtex, a plastic explosive, from the laptop.
    • The grenade launcher, for instance, transformed the striking power of small fighting groups; plastic explosives like Semtex were a similar boon.
    • Ms Murphy is still haunted by the memory of how Hindawi tried to send her to her death by packing her hand luggage with Semtex plastic explosives.

Origin

1980s: probably a blend of Semtin (the name of a village in the Czech Republic near the place of production) and explosive.

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