What is "propellor"

Usage examples of "propellor".

The craft even without a propellor would still answer the purpose his plan required of it--provided the captors of Tara of Helium were a people without ships, and he had seen nothing to suggest that they had ships.

The thrust of the propellor was inclined to make her veer to port a little, and clumsy hands at the wheel, instead of aiding her with a small amount of rudder, would put on a lot that would start her swinging until her wake looked like a wriggling snake behind her, and turn her into a horizontal pendulum.