| RA | cause to be seen by emitting light as if in rays |
|---|---|
| RA | esp. of the complexion: show a strong bright color, such as red or pink |
| RA | extend or spread outward from a center or focus or inward towards a center |
| RA | send out rays or waves |
| RA | diverging from a common point |
| RA | (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance |
| RA | the act of spreading outward from a central source |
| RA | a radial arrangement of nerve fibers connecting different parts of the brain |
| RA | the spread of a group of organisms into new habitats |
| RA | energy that is radiated or transmitted in the form of rays or waves or particles |
| RA | the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay |
| RA | syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions) |