Plural of copter; short, informal references to helicopters.
Shortened form of 'helicopter,' which comes from Greek 'helix' (spiral) + 'pteron' (wing), with 'copter' becoming common slang in the mid-20th century.
The word 'copter' is a fascinating example of how English speakers break down compound words—we extracted the 'copter' part and made it standalone, especially in military and emergency services.
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