Wiktionary
alt. A cloud from which rain is falling. n. A cloud from which rain is falling.
WordNet
n. a dark gray cloud bearing rain [syn: nimbus, nimbus cloud]
Usage examples of "rain cloud".
Lorena watched the cloud, which came down on them faster than any rain cloud.
A great roar of engines, an old-maidish waggle of the wings and it was gone, lost in a rain cloud and heading for Singapore over a thousand miles away.
Kestrel's form wavered at the edge of his sight, like a rain cloud.
It did not look like a rain cloud, but it was large enough to blot out the sun for half an hour.
He saw solid movement in the grey, wind-whipped scrub and dropped into a marksman's squat, drawing swift aim on the indistinct target, blinking the rain out of his eyes, waiting for a clean shot and then grunting with disappointment as he recognized his own partner, bowed under the glistening wet gas-cape, moving heavily as a pregnant woman in the gloom beneath the rain cloud and dense overhead branches.
The air was suddenly colder as the sun went behind a lingering rain cloud.
It seemed he could taste everywhere the water had ever beenthe icy peak, the swollen rain cloud, the stony mountain sluice.
Something as thin and slippery as the air, as dark as a rain cloud.