(1) Note the significance of the two prefixes " deci" and " deka". So, as far as the question of using a single word for "one hundredth of second" is concerned, we are left with only two choices: either we all agree to start calling it "centisecond" (and why not, when we already use terms like millisecond, microsecond, nanosecond etc?) or continue to call it "one-hundredth of a second" because we are too afraid and/or prejudiced and/or conservative to use an uncommon term like "centisecond"! Similarly, 1 kilometer = one thousand (1000) meter, 1 kilogram = one thousand (1000) gram, 1 kiloliter = one thousand (1000) liter. So, 1 centimeter = one hundredth (1/100) of a meter, 1 centigram = one hundredth (1/100) of a gram, 1 centisecond = one hundredth (1/100) of a second, although centigram and centisecond are hardly used.
When these prefixes are attached with any unit, they modify the magnitude of that unit by their respective values as shown above. are nothing but some of the most commonly used mathematical prefixes of Metric/SI System to arithmetically modify the magnitude of basic units of measurement wherein, , micro, milli, centi, deci, deka, hecto, kilo, mega, giga.
Strictly speaking, it is correct to say that one hundredth of a second = 1 centisecond as explained below although the word "centisecond" is rarely used in common language.
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