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Words that start with O

Orange orangutans avidly ogle an orchard of oleanders in Oregon.

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Ois forOdd

Something is odd if it is different to usual, or is a bit strange. In a group of things, something that is different is called the odd one out. The man in the picture is wearing odd socks.
Mathematically, a number is odd if it is not a multiple of two.

Ois forOdometer

An odometer is a device that is used for measuring how far you have traveled. Odometers are usually fitted inside cars and other vehicles.

Ois forOf

Of is a word that can indicate distance, source or reason. Some examples are:
"I live south of the intersection"
"a slice of cake"
"that dress is made of polyester".

Ois forOff

Something is off if it is not powered up and available to be used. The computer in the picture is switched off.
Off also can be used to indicate something no longer attached to something else: "the branch broke off the tree", or for reducing something: "take ten percent off the price".
The opposite of off is on.

Ois forOffice

An office is a room, a group of rooms or even an entire building where professionals work. Offices are usually full of desks and computers.

Ois forOffshore

Offshore means in the water some distance from the shore, the sandy area where land meets a body of water such as an ocean or a lake.

Ois forOhio

Ohio, abbreviated to OH, is a state in the mid west of the United States of America. The capital of Ohio is Columbus.

Ois forOil

Oil is a substance that is liquid at room temperature. Oil does not mix with water. Oil can be heated to much higher temperatures than water can, and so is useful in cooking food. Because oil does not stick to things, it is used to help stop food sticking when it is being cooked, and it helps stop parts of machinery like car engines from sticking together when they are running. Most oils will burn under the right conditions and can be used as a heat or light source, and a fuel to run things like internal combustion engines.
Oil can be made from the seeds of many plants, as well as dug up from under the ground. Oil that comes from the ground used to be plants or animals many thousands of years ago, and had been changed into oil by the movement of the Earth.

Ois forOK

O.K. is an abbreviation of okay.
O.K. is also an abbreviation of Oklahoma.

Ois forOkapi

The okapi is an animal that lives in the forests of Central Africa. It looks a bit like a mix of a deer and a giraffe, and it has dark brown and tan stripes on its legs.

Okapi use their long necks to reach leaves from trees. They are shy and live mostly alone.

Ois forOkay

OK or okay means everything is all right and good. OK is short for the slang "all correct", or orl korrect.

Ois forOklahoma

Oklahoma, abbreviated to OK, is a state in the south central region of the United States of America. The capital of Oklahoma is Oklahoma City.

Ois forOld

Something is old if it has existed for a very long time. Something that is really, really old is called ancient.
When people get old they get grey hair and wrinkles.
The Old English Sheepdog is a very old breed of large herding dog. It has very long, thick, grey-and-white hair all over it, covering its face. Old English sheepdog puppies are born black-and-white. They are friendly, sociable dogs. They are high maintainence though, as their coat needs regular brushing and clipping.
Something is old fashioned if it looks like it belongs in the past, and doesn't fit in with things around it. Clothes can be old fashioned, and behaviour can be old fashioned too.
Old fashioned things can also be called retro.

Ois forOleander

Oleanders, also known as rose laurel, are a pretty, evergreen flowering shrub. They usually have pink or white flowers.
Oleanders are one of the most poisonous plants known. Their sap is toxic, and even the dead, dried plant is dangerous. Horses have been known to die from eating oleander leaves. Even a single leaf might be enough to kill a small child.

Ois forOlive

Olives are the fruit of a small, slow-growing tree. They are originally from the Mediterranean region and grow best in poor soils in Mediterranean climates. Olives can be grown easily from both seeds and cuttings, but trees grown from seed don't always grow good fruit.
Olives can't be eaten fresh from the tree, they are too bitter. Olives need to be prepared by soaking them in salty water or otherwise preparing them to be eaten. Some types of olive can be pressed and oil made from them.

Ois forOlivine

Olivine is a common olive green mineral made up of magnesium iron silicate. It has also been found in asteroids and on the moon. Olivine can be quite brittle. When olivine is transparent and gem quality, is is called peridot.

Ois forOmelette

An omelette is made from beaten eggs, cooked in a frying pan. A little milk or cream is often added to the eggs, and sometimes omelettes are made from only the white of the eggs, without the yolk.
Omelettes may also contain added herbs, spices, diced vegetables or meat, particularly ham.

Ois forOmnivore

An omnivore is a person or animal that eats meat and vegetables.