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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 I

12 words start with I. Show all words

I

Icon Computers
A small picture on a screen that stands for a program, a file or a command.
Idiom English
A saying whose meaning is not the same as its words, like "it is raining cats and dogs".
Improper fraction Maths
A fraction whose top number is bigger than or equal to its bottom number, like 7/4.
Index English
A list at the back of a book that tells you which page to find a topic on.
Input Computers
Information that goes into a computer, for example by typing on a keyboard.
Insect Science
A small animal with six legs and three body parts, like an ant or a bee.
Insulator Science
A material that does not let heat or electricity pass easily, like rubber or plastic.
Integer Maths
A whole number that can be positive, negative or zero, like -3, 0 and 8.
Interjection English
A word that shows sudden feeling, like "wow" or "ouch".
Internet Computers
A giant network that connects computers around the world so they can share information.
Invertebrate Science
An animal with no backbone, such as a worm, a snail or a spider.
Isosceles triangle Maths
A triangle with two sides the same length and two angles equal.

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