Megaton (noun)

A unit of energy equal to one million tons of TNT, commonly used to describe the yield of nuclear weapons.

Origin:

From the greek μέγας (mega) meaning "great" and the english word "ton".

Examples:

1. The bomb had a yield of 20 megatons.
2. The explosion was equivalent to a megaton of TNT.
3. The megaton bomb was capable of causing widespread destruction.
4. The country's nuclear arsenal was measured in megatons.
5. The megaton bomb was tested in the desert.