Englishfor English speakers
elastic
Adjective
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Something is elastic if it can stretch or bend and go back to the way it was.
She held the papers together by putting an elastic (rubber) band around them.
A metal spring is elastic: it gives back the energy that was put into it when it was pushed.
algebra
Noun
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Algebra is a kind of mathematics where a letter (called a variable) can replace a number that is not known.
Using algebra, we can define a line with the formula mathy = x + 3/math