halation

When viewed from several feet away, the dots coalesced into a halation of amorphous color.

The same mixture makes an excellent backing for dry plates to prevent halation.

Mr. Russell, Government Astronomer of New South Wales, finds that the "halation" of star photographs can be prevented by pouring over the back of the plate a film of collodion suitably stained.

Between Lida and the men who were circling the fire there was a veil of mist, and in the halation her champions loomed with heroic stature.

The first advantage, which I soon discovered, is their entire freedom from halation.