n.1 a rotary part of a machine, esp. in the distributor of an internal-combustion engine.
2 a set of radiating aerofoils round a hub on a helicopter, providing lift when rotated.
Etymology: irreg. for ROTATOR
n.1 a rotary part of a machine, esp. in the distributor of an internal-combustion engine.
2 a set of radiating aerofoils round a hub on a helicopter, providing lift when rotated.
Etymology: irreg. for ROTATOR
Oxford English vocab. Оксфордский английский словарь. 2012