Englishfor English speakers
tooth
Noun
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A tooth is a hard, white thing in your mouth. You use your teeth to chew food.
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A tooth is a sharp point sticking out of something and forms a row of sharp objects for cutting.
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A tooth is a rounded point on a gear that is used to transmit or receive force and motion to other gears.
length
Noun
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The length of an object is the distance between one end of that object and the other.
What is the length of the car?
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The length of a horse is used to show the distance between horses at the end of a race.
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Length is the distance down the pitch that the ball bounces on its way to the batsman.