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helicopterMain Entry: 1he·li·cop·ter Pronunciation: \ˈhe-lə-ˌkäp-tər, ˈhē-\ Function: noun Etymology: French hélicoptère, from Greek heliko- + pteron wing — more at feather Date: 1887 : an aircraft whose lift is derived from the aerodynamic forces acting on one or more powered rotors turning about substantially vertical axes
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