thundercloud

American  

[thuhn-der-kloud] / ˈθʌn dərˌklaʊd /

Or thunderclouds

noun

1. cumulonimbus.

---

thundercloud British  

/ ˈθʌndəˌklaʊd /

noun

1. a towering electrically charged cumulonimbus cloud associated with thunderstorms

2. anything that is threatening

---

thundercloud Scientific  

/ thŭn′dər-kloud′ /

1. See cumulonimbus

---

Etymology

Origin of thundercloud

First recorded in 1690–1700; thunder + cloud

Example Sentences

With thunderclouds rolling in, McCormick suggested I get in touch with Kersti Muul, who has been tracking a pair of merlins in my part of the city, West Seattle.

From Seattle Times

A honeybee swarm has as much electric charge as a thundercloud, and the insects’ mass movements in the atmosphere might even have some influence on the weather.

From Scientific American

From plane windows, I have seen the Grand Canyon, the Alps, a comet, towering thunderclouds with lightning flashes, and many other wonders.

From Washington Post

A thundercloud of media interest has hung over claims of a strained brotherly relationship, now conducted from different sides of the Atlantic.

From BBC

“High ground temperature leads to evaporation from water bodies that adds moisture to the atmosphere. The presence of aerosols due to air pollution creates favorable conditions for thunderclouds to trigger lightning activity,” Gupta said.

From Seattle Times