Children's Illustrated Dictionary.

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

right angle
right angles noun
an angle that measures
90 degrees, formed by two
lines that are perpendicular
to one another (see shape
on page 182).
The four inside corners of
a square are right angles.

rim
rims noun

the edge or border
of something.

He looked over the rim of
the volcano into the crater.

ring
rings ringing rang rung verb
1 to strike metal
or play a bell so
that it makes
a pleasant sound.

2 to sound or press a doorbell.
I rang the doorbell three
times but no one answered
the door.

ring
rings noun
a piece of jewelry
that is worn on
your finger
(see jewelry
on page 112).

rinse

rinses rinsing rinsed verb

to wash something in water

with no soap in it.

riot

riots noun

uncontrolled fighting

among a crowd of people

who are angry or protesting

about something.

N say ry-ut

rip

rips ripping ripped verb

to tear something, usually

cloth or paper.

He ripped

the piece of paper in half.

ripe

adjective

ready to pick or eat, usually

used about fruit.

N comparisons riper ripest

N opposite unripe

ripple

ripples noun

a small wave on the surface

of water.

When the duck dived, it made

ripples on the water’s surface.

rise

rises rising rose risen verb

to go upward or

become higher.

Heat rises.

rising adjective

risk

risks risking risked verb

to take the chance of

harming or losing something.

He risked his life to save her.

risk noun

risky adjective

river

rivers noun

a large stream of water

that flows into another river,

a lake, or the ocean.

road

roads noun

a path for vehicles to travel

on, usually with a hard,

smooth surface.

roar

roars roaring roared verb

to make a

loud, deep,

rumbling

noise like

the noise a

lion makes.

roast

roasts roasting roasted verb

to cook food in a hot oven

or over a fire.

rob

robs robbing robbed verb

to steal from someone, often

by using violence.

They robbed the bank.

robbery noun

robber

robbers noun

a person who robs you of

something, usually money

or goods.

robot

robots noun

a machine that can imitate

some human actions. Robots

are often used

in factories,

but can

also be used

in homes.

A toy robot runs on batteries.

rock

rocks noun

a hard, natural, nonliving

substance.

Mountains are made

up mostly of rock.

granite rock

rocky adjective

rock

rocks rocking rocked

verb

to move gently

backward and

forward, or

from side

to side.

rock

rocking chair