Words that start with O

Ois forOpal

Opal is not a true mineral, but a crystalline gel made up of spheres of silicon dioxide and water. The pattern of the spheres makes opal refract light into lots of different colours, with blue and green being the most common. Opal is used often in jewelry, and is the national stone of Australia.

Stones

Stockingvixen / CC BY-SA

Ois forOpaque

Something is opaque if you can't see through it. Most things are opaque. The term is most often used to describe stockings that are not transparent.

Adjectives

Arquera / CC BY-SA

Ois forOpen

Something is open if you can go through it or into it. The door in the picture is open. The opposite of open is closed.

Adjectives

S Pisharam / CC BY-SA

Ois forOphidiophobia

Ophidiophobia or ophiophobia is a fear of snakes. Many people are scared of snakes because snakes are actually quite dangerous and should be treated with caution, but they do not have a phobia of snakes. People who are ophidiophobic are irrationally afraid of snakes, even just in pictures or on television where there is no real threat.

Phobias

Juan Tello / CC BY-SA

Ois forOpossum

Scientific name: order: didelphimorphia

Opossums are a small to medium sized, common creature that has spread from the western United States. They have a varied diet and are successful breeders. They are the only marsupial found outside of the Australian area.

Marsupials

roweenaweb / CC BY-SA

Ois forOpposite

Two things are opposites if they are as different to each other as possible. Some examples of opposites are black and white, good and bad, little and big.

Seth Anderson / CC BY-SA

Ois forOr

Or is a word that is used to connect two other words or phrases that are alternatives, for example "do you want beef or chicken?"

Conjunctions

Kyle McDonald / CC BY-SA

Ois forOrange

Scientific name: citrus sinensis

An orange is the name for both a colour and a citrus fruit. Oranges are similar to lemons but are very sweet and can be eaten raw, squeezed to make juice, and can be made into marmalade. The colour orange can be made by mixing red and yellow paint.

Colors, Citrus

chem7 / CC BY-SA

Ois forOrangutan

Scientific name: pongo borneo

Orangutans are reddish-brown apes that live in trees, and are the largest animal that lives entirely in trees. They can weigh up to 113kg, but are usually around 33-82kg. Their arms are twice as long as their legs. Orangutans live almost entirely on fruit, but will also eat leaves, honey and eggs.

Primates

Kevin Saff / CC BY-SA

Ois forOrb

An orb is another word for a sphere. The word is most often used to describe mystical or very decorative spheres, such as Christmas decorations or crystal balls.

Shapes