nimbus clouds

1. The dark clouds characteristic of storms.

Example Sentences

On February 23 there was a spell of dead calm; heavy nimbus clouds and fog lowering over sea and plateau.

From Project Gutenberg

During the whole day nimbus clouds had hung heavily from the sky, and snow had fallen in grains and star-like crystals.

From Project Gutenberg

At three P.M. the blue sky appeared in the west, and the nimbus clouds subsided.

From Project Gutenberg

A hot wind blew from the north and now brought with it smoke and an overcast sky, which in the evening turned to nimbus clouds.

From Project Gutenberg