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Little Explorers
English Picture 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
o in Morse Code o in ASL
O is for ...
o in Braille o Marine Signal Flag


oar

An oar is used to row a boat.


oatmeal

Oatmeal is a cereal.
Barack Obama
Obama, Barack H.

Barack Obama is the 44th President of the USA.


obelisk

An obelisk is a tall, four-sided tower topped with a pyramid.


oboe

The oboe is a woodwind instrument with a double reed.


observatory

An observatory is place where people observe the skies, using a device like a telescope.


obtuse angle

An obtuse angle is greater than ninety degrees.


ocean

An ocean is a large body of salt water that surrounds a continent. Oceans cover more the two-thirds of the Earth's surface.


Oceania

Oceania is a region of islands in the Pacific Ocean, including the Salomon Islands, Micronesia, Kiribati, Fiji, Tonga, Polynesia, Samoa, Australia, and others.


ocelot

Ocelots are wild cats from rainforests and grasslands in the Americas.


octagon

An octagon is an eight-sided figure. Stop signs are octagons.


octahedron

An octahedron is an eight-sided geometric solid.


October

October is the tenth month of the year.


octopus

The octopus is an ocean animal (a cephalopod) that has eight arms and lives on the sea floor. The plural of octopus is octopuses.
1, 3, 5, 7, 9, 11, ...

odd number

An odd number is not divisible by two.


ogre

Ogres are ugly, scary and make-believe.


Ohio

Ohio is a state in the United States of America. Its capital is Columbus.


oil

Oil is a greasy liquid.


oilcan

An oilcan is a container for oil.


oil painting

An oil painting is a picture made using oil paints.
okapi

okapi

The okapi is a nocturnal, giraffe-like mammal from African rainforests.


Oklahoma

Oklahoma is a state in the United States of America. Its capital is Oklahoma City.


old

When someone or something is old, it has been around for a long, long time.


old English sheepdog

The old English sheepdog is an affectionate, long-haired dog that was originally bred in Great Britain.


olive

An olive is an oily fruit that grows on an evergreen tree.


Olympics

The Olympic Games began over 2700 years ago in ancient Greece.


omelet

An omelet is a dish made from eggs.


omnivore

An omnivore is an animal that eats plants and meat. People are omnivores


on

The vase is on the table.


one

One is a small number.
1/2
one half

When something is divided into two equal parts, each of these two parts is one half of the original object.


onion

Onions are sharp tasting vegetables.


open

Something that is open is not shut. The door is open.


opossum

The Virginia opossum is the only marsupial from North America.


opposites

Opposites are things that are very, very different from each other. Some examples of opposites are: left and right, big and small, up and down, tall and short.


orange

Orange is a color. You can mix red and yellow paint to get orange.


orange

Oranges are sweet, juicy fruit.


orange juice

Orange juice is made from oranges.


orangutan

Orangutans are large, tree-dwelling apes from rainforests in southeast Asia.


orb

A ball-shaped object is an orb.


orbit

The Moon orbits the Earth. The Earth orbits the Sun.


orb weaver

The orb weaver is a type of spider that builds a loosely-woven web.


orca

Orcas are also known as killer whales. An orca eats hundreds of pounds of fish and marine mammals every day.


orchid

Orchids are colorful flowers that live in warm areas.


ordinal number

An ordinal numbers show the position in a series or the order. Some ordinals are first (1st), second (2nd), third (3rd), fourth (4th), fifth (5th), sixth (6th), seventh (7th), eighth (8th), ninth (9th), tenth (10th), eleventh (11th), twelfth (12th), etc.


Oregon

Oregon is a state in the northwestern United States of America. Its capital is Salem.


origami

Origami is the art of folding paper into beautiful shapes.

oriole

The oriole is a black and orange bird that eats fruit and nectar. It builds a hanging nest.


Ornithomimus

Ornithomimus was an ostrich-like dinosaur.


oropendola

The crested oropendola is a tropical black bird that makes long, pendulous nests.
oryx

oryx

Oryx are long-horned antelopes from dry areas in Africa and Asia.


ostrich

The ostrich is the largest bird and is from Africa. It can't fly, but it runs very fast.


otter

An otter is a playful aquatic mammal.
ouch

ouch

Sometimes, when they're hurt, people say, "Ouch."


ounce

An ounce is a unit of weight. One cup of water weighs eight ounces.


our

This is our beachball; we share it.


Ouranosaurus

Ouranosaurus was a sail-backed, plant-eating dinosaur.


out

He is going out the door.


outlet

An electrical outlet is a device that is connected to an electrical supply. We plug electrical devices into an outlet so they can receive power. Outlets are usually mounted on a wall.


outside

When you are outside, you are not in a building or other structure.


oval

An oval is an egg-shaped figure.


oven

Ovens get very hot. You can bake food in an oven.


oven mitt

An oven mitt protects your hand when you put things in or out of an oven.


over

The cloud is over the mountain.


overalls

Overalls are baggy pants with shoulder straps and a piece of fabric covering the chest.


overcoat

An overcoat will keep you warm when it is cold.


Oviraptor

Oviraptor was a small, omnivorous dinosaur.


owl

Owls are birds of prey that have large eyes and very good eyesight. Most owls hunt at night.


ox

Oxen are large, hairy mammals that live in the far north.


oyster

The oyster is a soft-bodied marine animal that is protected by two hard shells.


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English Picture Dictionary
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