| NOUN | communication | file name extension, extension, filename extension | a string of characters beginning with a period and followed by one or more letters |
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| Meaning | A string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename. | |
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| Synonyms | extension, filename extension | |
| Part of | filename, file name, computer filename, computer file name | (computer science) the name given to a computer file in order to distinguish it from other files |
| Broader | string | A linear sequence of symbols (characters or words or phrases) |
| Spanish | extensión | |
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