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Kids glossary

Words explained simply

419 words from maths, science, computers and English, each explained in a sentence or two. Pick a letter, or scroll down for all of them.

Words that start with C

43 words start with C. Show all words

C

Capacity Maths
How much a container can hold, such as 2 litres of water.
Capital letter English
A big letter like A or B, used at the start of a sentence and for names.
Caption English
The short words under a picture that explain it.
Carbon dioxide Science
A gas that animals breathe out and plants use to make food.
Carnivore Science
An animal that eats only other animals, like a lion.
Cell Science
The tiny building block that all living things are made of.
Centimetre Maths
A small unit of length. There are 100 centimetres in 1 metre.
Character English
A person or animal in a story.
Chlorophyll Science
The green substance in leaves that catches sunlight so the plant can make food.
Chord Maths
A straight line that joins two points on a circle. The longest chord is the diameter.
Circle Maths
A perfectly round shape where every point on the edge is the same distance from the centre.
Circuit Science
A complete path that electric current can flow around.
Circumference Maths
The distance all the way around a circle, like its perimeter.
Citation English
A note that tells where you found a fact or a quote, such as the name of the book or website.
Clause English
A group of words with a subject and a verb. It can be a whole sentence or part of one.
Climate Science
The usual weather of a place over many years.
Cloud storage Computers
Keeping your files on computers on the internet, so you can open them from many devices.
Code Computers
The instructions written for a computer in a programming language.
Coding Computers
Writing instructions for a computer to follow.
Colon English
The mark : that comes before a list or an explanation.
Comma English
The mark , that gives a short pause in a sentence or separates items in a list.
Command Computers
An instruction you give to a computer.
Compound word English
A word made by joining two words, like "football" or "sunflower".
Computer Computers
A machine that follows instructions to take in information, work with it and show results.
Condensation Science
When a gas such as water vapour cools and turns into liquid drops.
Conditional Computers
A coding idea that says "if this is true, do that", like if it is raining, take an umbrella.
Conductor Science
A material that lets heat or electricity pass through it easily, like copper.
Cone Maths
A solid shape with a round flat base and one point at the top, like an ice-cream cone.
Conjunction English
A joining word such as "and", "but" or "because".
Consonant English
A letter that is not a vowel, like b, c, d or t.
Consumer Science
A living thing that cannot make its own food and eats plants or animals.
Contraction English
A shorter word made by joining two words and leaving out some letters, like "can't" for "cannot".
Coordinates Maths
A pair of numbers that tells you where a point is on a grid, like (3, 2).
Copy and paste Computers
Copying something and putting a duplicate of it somewhere else.
CPU Computers
The central processing unit, the part of the computer that does the thinking and calculating.
Cube Maths
A solid shape with six square faces that are all the same size, like a dice.
Cube number Maths
The answer when you multiply a number by itself three times. For example, 2 x 2 x 2 = 8, so 8 is a cube number.
Cube root Maths
The number that makes a cube number when multiplied by itself three times. The cube root of 27 is 3.
Cuboid Maths
A solid shape with six rectangle faces, like a brick or a matchbox.
Current Science
The flow of electric charge round a circuit.
Cursor Computers
The small mark on the screen that shows where you are typing or pointing.
Cyberbullying Computers
Being unkind to someone online or on a phone. If it happens, tell a trusted adult.
Cylinder Maths
A solid shape with two flat round ends and a curved side, like a tin of beans.

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