Comet.
The fifth reindeer of Santa Claus.
Meaning & usage
The fifth reindeer of Santa Claus.
Where this word comes from
First attested in the 1823 poem “A Visit from St. Nicholas”. From comet.
A web application model in which a long-held HTTP request allows a web server to push data to a browser, without the browser explicitly requesting it.
Where this word comes from
Coined by software engineer Alex Russell in March 2006. After the Comet brand of cleaning products, as a pun on Ajax, which is also both a Web programming technique and a brand of cleaning products.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.