| a scrap or morsel of food left at a meal. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
halo ha·lo (hā'lō)
n. pl. ha·los or ha·loes
A reddish yellow ring surrounding the optic disk, caused by an expansion of the scleral ring that makes the deeper structures visible.
Glaucomatous halo.
A ring of light surrounding a luminous body.
| halo (hā'lō) Pronunciation Key
A hazy ring of colored light in the sky around the Sun, Moon, or a similar bright object. A halo is caused by the reflection and refraction of light through atmospheric ice crystals. |