cirrocumulus: meaning, definition, pronunciation and examples
C1/C2Technical/Scientific
Quick answer
What does “cirrocumulus” mean?
A type of cloud found at high altitude, appearing as thin, white patches or layers composed of very small elements.
Audio
Pronunciation
Definition
Meaning and Definition
A type of cloud found at high altitude, appearing as thin, white patches or layers composed of very small elements.
In meteorology, a genus of high-altitude cloud characterized by a layer or patch composed of very small cloudlets, often in a rippled or mottled pattern, indicating atmospheric instability at high levels.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; the meteorological term is identical. Spelling follows the same Latin-root pattern.
Connotations
Identical technical connotations. In non-technical descriptions, British weather reporting might use the simile 'mackerel sky' slightly more often.
Frequency
Equally low frequency in general discourse but standard within meteorology and aviation contexts in both regions.
Grammar
How to Use “cirrocumulus” in a Sentence
[The/Subject] + [verb: be, appear, form] + [cirrocumulus][Observer] + [verb: see, observe, note] + [cirrocumulus] + [prepositional phrase: in the sky]Vocabulary
Collocations
Examples
Examples of “cirrocumulus” in a Sentence
adjective
British English
- The cirrocumulus formation suggested increasing high-level moisture.
American English
- A cirrocumulus sky often precedes a cold front.
Usage
Meaning in Context
Business
Rare, except in specific contexts like aviation insurance or weather-dependent event planning.
Academic
Common in meteorology, climatology, atmospheric science, and geography textbooks and papers.
Everyday
Very rare in casual conversation. Might be used by weather enthusiasts or in poetic descriptions of the sky.
Technical
Standard term in meteorology, aviation weather reports (METAR), and sailing forecasts.
Vocabulary
Synonyms of “cirrocumulus”
Neutral
Weak
Vocabulary
Antonyms of “cirrocumulus”
Watch out
Common Mistakes When Using “cirrocumulus”
- Mispronunciation: stressing the first syllable ('SIR-o-') instead of the third ('-KYOO-').
- Misspelling: 'cirro-cumulus' with a hyphen (sometimes acceptable but not standard), 'ciroccumulus'.
- Confusing it with altocumulus, which is a mid-level cloud with larger elements.
FAQ
Frequently Asked Questions
No, cirrocumulus clouds are composed of ice crystals and are too high and thin to produce precipitation that reaches the ground. They are often associated with fair but changing weather.
Use the 'thumb rule'. If you extend your arm and a cloud element is about the size of your thumbnail, it's altocumulus. If it's much smaller (like a pea or grain of rice), it's likely cirrocumulus. Also, cirrocumulus is higher and whiter.
In meteorological codes and cloud charts, it is abbreviated as 'Cc'.
Typically, yes. The phrase 'mackerel sky' colloquially describes the scaly, rippled pattern characteristic of cirrocumulus (and sometimes altocumulus) clouds.
A type of cloud found at high altitude, appearing as thin, white patches or layers composed of very small elements.
Cirrocumulus is usually technical/scientific in register.
Cirrocumulus: in British English it is pronounced /ˌsɪrəʊˈkjuːmjʊləs/, and in American English it is pronounced /ˌsɪroʊˈkjuːmjələs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “A mackerel sky (referring to the pattern of cirrocumulus)”
Learning
Memory Aids
Mnemonic
Think: 'CIRRO' (high, wispy) + 'CUMULUS' (heap/puffy) = high, puffy clouds. Remember 'Cirrus clouds are high, Cumulus are lumpy; together they make a cirrocumulus sky, often bumpy.'
Conceptual Metaphor
SKY AS A CANVAS / SKY AS A TEXT (to be read by forecasters). The pattern of cirrocumulus is often interpreted as a 'text' indicating future weather changes.
Practice
Quiz
What does the presence of cirrocumulus clouds most likely indicate?