Definition of multimegaton in English:

multimegaton

adjective

  • Of a nuclear weapon: having an explosive power of many megatons; (figurative) extremely powerful.

Origin

1950s; earliest use found in James Blish (1921–1975). From multi- + megaton.

Pronunciation

multimegaton

/ˌmʌltɪˈmɛɡətʌn/