Fission vs Thermonuclear - What's the difference?

As a noun fission

is the process whereby one item splits to become two.

is to cause to undergo fission.

of, or relating to the fusion of atomic nuclei at high temperatures.

(Nuclear fission)

The process whereby one item splits to become two.

(physics) The process of splitting the nucleus of an atom into smaller particles; nuclear fission

(biology) The process by which a bacterium splits to form two daughter cells.

* (process of splitting the nucleus of an atom) fusion

* fissile * fissionable * fissional * fission bomb

To cause to undergo fission.

To undergo fission.

(wikipedia thermonuclear)

(-)

Of, or relating to the fusion of atomic nuclei at high temperatures.

Of, or relating to the use of atomic weapons based on such fusion, especially as distinguished from those based on fission.

* The first thermonuclear reaction was in a star; it was brought about by heat, as the description implies. .