single-rotor helicopter

1. 1.

   a helicopter having a single rotor

   Broaderhelicopter

Questions about single-rotor helicopter

What does single-rotor helicopter mean?

single-rotor helicopter means "a helicopter having a single rotor".

Is single-rotor helicopter a common word?

single-rotor helicopter is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.