the relative position or standing of things or especially persons in a society | (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance |
a state at a particular time | the apparent enlargement of a bright object when viewed against a dark background |
| (Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus |
| (physiology) the spread of sensory neural impulses in the cortex |
| a column of light (as from a beacon) |
| the condition of being exposed to radiation |