| Definition/Meaning | Word/Phrase |
|---|---|
| bluish discoloration of the skin and mucous membranes; a sign that oxygen in the blood is dangerously diminished (as in carbon monoxide poisoning) | cyanosis |
| localized area of diminished vision edged by shimmering colored lights; in many people it indicates the onset of migraine | flittering scotoma , scintillating scotoma |
| pause during which things are calm or activities are diminished | letup , lull |
| isolated area of diminished vision within the visual field | scotoma |