C-4

noun \ ˈsē-ˈfȯr \

Definition of C-4

: a high explosive composed of various chemicals that make it moldable and plastic
  • Before it was detonated, I held a piece of C-4 plastic explosive about the size of a baseball. It felt slightly greasy and granular, but otherwise indistinguishable from my daughter's Play-Doh.
  • —Eric Schlosser

First Known Use of c-4

1964

in the meaning defined above

See Words from the same year
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