time standard

(redirected from Units of time)
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time standard

[′tīm ‚stan·dərd]
(horology)
A recurring phenomenon, used as a reference for establishing a unit of time; the presently accepted standard is the second, defined to be 9,192,631,770 transitions between two specified hyperfine levels of the atom of cesium-133.
(industrial engineering)
References in periodicals archive ?
Since there is no SI base unit for the direct measurement of gas flow, the base units of time and length are used to calculate flow rates.
Julavits arranges the raw material of her diary in such a way as to provoke insight across the units of time that we normally experience: the day, the week and the month.
Time is what we're talking about, applying units of time to specific training goals.
Scientists add a leap second for the same basic reason that calendars have a leap year: because the movement of the Earth refuses to correspond exactly to our units of time.
With business modeling and a rich set of features with built-in understanding of units of time and other basics, users can define the concepts set forth in their rules, making them logically understood by the system.