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SI derived unit

[ ĕsī ]
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Any of the units of measure derived from combinations of the seven base units and two supplementary units of the International System. See Table at measurement.

QUIZZES

QUIZ YOURSELF ON PARENTHESES AND BRACKETS APLENTY!

Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!
Question 1 of 7
Let’s start with some etymology: What are the origins of the typographical word “bracket”?
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