- A binary prefix meaning 250, or 1,125,899,906,842,624. For example, a pebibyte is equal to 250 bytes. This prefix is utilized to refer to only binary quantities, such as bits and bytes Its abbreviation is Pi-.
- abbreviation Pi-
- An irrational number whose value is approximately 3.14159265358979, although it continues indefinitely in a non-repeating manner. It is used in many calculations. Its symbol is π.
- noun the ratio of the circumference of a circle to its diameter.
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