Act of irradiating, or state of being irradiated.
Illumination; irradiance; brilliancy. Sir W. Scott.
Fig.: Mental light or illumination. Sir M. Hale.
The apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, esp. when a little out of focus.
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