English to English Dictionary

Radar dish

A concave, parabolic antenna used to transmit and receive radio waves for detecting the position, speed, and other characteristics of remote objects.

Radar site

A designated location equipped with radar transmitters and receivers used for detecting aircraft, ships, or weather formations.

Radar station

A facility equipped with radar transmitter and receiver apparatus for detecting the position, speed, and direction of aircraft, ships, or weather formations.

Radio Astronomy

The branch of astronomy that studies celestial bodies by means of the radio waves they emit.

Railroad

A track made of steel rails along which trains run.

Rainforest

A luxuriant, dense forest rich in biodiversity, found typically in tropical areas with consistently heavy rainfall.

Ram

An uncastrated adult male sheep.

Rant

A long, angry speech of complaint or accusation.

Raptor

A bird of prey, such as an eagle, hawk, falcon, or owl, characterized by hooked bills and sharp talons.

Raster

A rectangular pattern of parallel scanning lines on a television screen or computer monitor that form a displayed image.

Rat race

A fierce, relentless competition for success, power, or wealth, typically in a hectic modern work environment.

Ratio

The quantitative relation between two amounts showing the number of times one value contains or is contained within the other.