English to English Dictionary

Rabble

A disorderly crowd, mob, or the lowest class of people.

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 facility

An installation equipped with radar transmitters and receivers used for detecting and tracking objects such as aircraft, ships, or weather systems.

Radicalism

The beliefs or actions of people who advocate for thorough or complete political or social reform.

Radio Astronomy

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

Radio Telescope

A directional antenna used in radio astronomy to gather radio frequency radiation from astronomical sources in the sky.

Radioastronomy

The branch of astronomy that studies celestial bodies and phenomena by measuring 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.

Raise

To lift or move something to a higher position or level.

Ram

An uncastrated adult male sheep.

Rant

A long, angry speech of complaint or accusation.