nimbostratus
/ˌnɪmboʊˈstreɪtəs/
noun
- A thick, gray cloud that covers the sky and brings steady rain or snow.
- The sky was covered with nimbostratus clouds, and it rained all afternoon.
- Nimbostratus often produces long periods of light to moderate precipitation.
- We canceled our picnic because a layer of nimbostratus blocked the sun and promised rain.