A red chalk found in Lemnos.

A stout short-billed wading bird in the wader family of Scolopacidae; Arenaria interpres.

plural of ruddy diver

Synonym of ruddy duck

The South American ground dove Columbina talpacoti.

plural of ruddy ground dove

A large village in Rushcliffe borough, Nottinghamshire, England (OS grid ref SK5732).

plural of ruddervator

(aviation) A hinged control surface combining the functions of rudder and elevator.

(aviation) A type of control surface, usually found on flying wing aircraft, consisting of two pairs of panels (one mounted near each wingtip on the wing's trailing edge), with one lying on top of the other sandwich-style; to roll the aircraft, both panels on one wing deflect downwards (increasing the lift of that wing) and both panels on the othe wing deflect upwards (decreasing the lift of that wing), while, to yaw the aircraft, the panels on one wing split apart from each other (the upper panel deflects upwards, and the lower panel deflects downwards), increasing the drag on that wing.