Scrabble?! RADIATION

Definitions of RADIATION in various dictionaries:

noun - energy that is radiated or transmitted in the form of rays or waves or particles

noun - the act of spreading outward from a central source

noun - syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions)

noun - the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

noun - the spread of a group of organisms into new habitats

noun - a radial arrangement of nerve fibers connecting different parts of the brain

noun - (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

The act or process of radiating: the radiation of heat and light from a burning body.

Physics.

Emission and propagation of energy in the form of rays or waves.

Energy radiated or transmitted in the form of rays, waves, or particles.

A stream of particles or electromagnetic waves emitted by the atoms and molecules of a radioactive substance as a result of nuclear decay.

Radial arrangement of parts, as of a group of nerve fibers connecting different areas of the brain.

The spread of a group of organisms into new habitats.

Adaptive radiation.