A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Rr

rabbi

rabbis noun

a teacher of the Jewish

religion and law.

N say rab-eye

rabbit

rabbits noun

a small mammal with long

front teeth that lives

underground in burrows.

Rabbits are normally active in

the evening or at night. They

eat grass, roots, and leaves.

race

races noun

1 a competition of speed.

A swimming race.

raceverb

2 a group of people who

share the same ancestors

and may share some

physical characteristics.

racial adjective

racket

rackets noun

1 a bat with

strings used

for playing

sports such

as tennis and

badminton (see

sport on page 197).

badminton racket

2 a loud,

annoying noise.

He was making

a racket with

his drums.

radar

noun

a device that tells you

the position and speed of

ships, cars, and aircraft

by sending out radio waves.

An airport radar screen.

N say ray-dar

radiator

radiators noun

1 a thin, metal tank with hot

water flowing through it that

heats a room.

2 a metal tank that allows

air to cool the hot water in

the engine of a vehicle.

N say ray-dee-ay-tor

radio

radios noun

a device that sends or

receives electrical signals

and changes them

into sound.

radioactivity

noun

the energy released by the

center of atoms breaking

up in some substances. High

amounts of radioactivity can

be harmful to living things.

They tested for radioactivity

outside the nuclear

power plant.

N say ray-dee-oh-ak-tiv-i-tee

radioactive adjective

radius

radii or radiuses noun

a straight line drawn

from the center

of a circle to

its outer

edge.

rag

rags noun

a small, torn piece of cloth.

rage

rages noun

anger or uncontrolled temper.

In her rage, she slammed

the door shut.

raid

raids noun

a sudden surprise attack

by a group of people.

The police made a raid on the

house, arresting two women.

raid verb

rail

rails noun

1 a long bar for holding on to,

or for hanging clothes on.

Use the rail to help you climb

the stairs.

2 a long line of metal track

that trains run along.

3 the railroad.

We traveled by rail

around Europe.

rabbi

radius

raft

rafts noun

1 a floating platform

made of logs that

have been tied

tightly together.

life raft

2 a hollow mat made of rubber

or plastic and filled with

air that can

be used as

a boat.