risetime

noun
rise·time | \ˈrīz+ˌ\

Definition of risetime 

: the time required for a pulse or signal (as on an oscilloscope) to increase from one specified value (as 10 percent) of its amplitude to another (as 90 percent)

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First Known Use of risetime

1941, in the meaning defined above

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The first known use of risetime was in 1941

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a state of commotion or excitement

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