π
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Ancient Greek
Symbol
π
- A fraction of one half in the acrophonic numeral system that predated the gematria system. Equivalent to the Roman digit S.
Usage notes
π may be used alone or appended to whole numbers, and precedes π (ΒΌ), as in ΞΞΞΞπ (4Β½), π π π (5ΒΎ) and Ξπ Ξπ (16Β½).