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Symbol | Definition |
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≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
Petasecond is equal to 1 000 000 000 000 000 second (unit of time), comes from a combination of the metric prefix peta (P) with the second (s). Plural name is petaconds with symbol is Ps.
Centisecond is equal to 10-2 second (unit of time), comes from a combination of the metric prefix centi (c) with the second (s). Plural name is centiseconds.