|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|pathol illness caused by overexposure of the body or a part of the body to ionizing radiations from radioactive material or X-rays. It is characterized by vomiting, diarrhoea, and in severe cases by sterility and cancer|
radiation sickness n.
Illness induced by ionizing radiation, ranging in severity from nausea, vomiting, headache, and diarrhea to loss of hair and teeth, reduction in red and white blood cell counts, extensive hemorrhaging, sterility, and death.