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First, a fun fact: The prefix “nano” comes from the Greek language, a masculine form of the word “nanna,” which literally means “little aunt” or “little old lady.” Later it came to mean “dwarf,” at first a very small person, then a very small anything. At an international chemical conference in 1947, the word was adopted as a prefix for 10-9 part of something, or a billionth, as in nanometer or nanosecond.

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