opacus
- noun
- Specialized
- Pilots must be cautious when flying through opacus as visibility can be greatly reduced.
Examples
-
We could not see the sun at all because of the persistent opacus overhead.
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The sky was filled with opacus clouds today.
-
The weather report mentioned a thick layer of opacus covering the entire region.
-
An opacus layer can block sunlight completely.
-
The storm brought many opacus clouds, which completely blocked the sunlight.
-
During the eclipse, we observed a layer of opacus clouds that obscured the moon.
-
The weather report warned of a day filled with opacus clouds, making it gloomy outside.
Synonyms
1
5.9
A low gray cloud that forms a flat sheet and often blocks the sun
1
7.9
A low, thick cloud made of lumpy patches that often covers the sky
1
3.5
A low, flat gray cloud layer that often covers the sky and brings light drizzle
Antonyms
How Opaque
Surface Forms
Etymology
Opacus as a noun comes from Latin opacus, meaning 'shaded' or 'dark', and is related to opaque ('not letting light through'). So an opacus is a cloud layer that is thick enough to block the sun or moon.