Anvil: The upper portion of a cumulonimbus cloud that becomes flat and spread-out, sometimes for hundreds of miles downstream from the parent cloud. It may look smooth or fibrous, but in shape, it resembles a blacksmith's anvil. It indicates the mature or decaying stage of a thunderstorm.

 

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Anvil: The upper portion of a cumulonimbus cloud that becomes flat and spread-out, sometimes for hundreds of miles downstream from the parent cloud. It may look smooth or fibrous, but in shape, it . . . View Full Definition

Kenning: a compound word in Old English poetry that replaces the usual name for something, often involving metonymy.

Thread Micrometer: A micrometer in which the spindle is ground to a point having a conical angle of 60 degrees. The anvil, instead of being flat has a 60-degree V-Shaped groove, which fits the thread.

Cumulonimbus: A vertically developed cumulus cloud, often capped by an anvil-shaped cirriform cloud. Also called a thunderstorm cloud, it is frequently accompanied by heavy showers, lightning, thunder, an . . . View Full Definition

Cirrus: One of the three basic cloud forms (the others are cumulus and stratus). It is also one of the three high cloud types. Cirrus are thin, wispy clouds composed of ice crystals and often appear . . . View Full Definition

Towering Cumulus: Another name for cumulus congestus, it is a rapidly growing cumulus or an individual dome-shaped clouds whose height exceeds its width. Its distinctive cauliflower top often mean showers bel . . . View Full Definition