I cannot write an accurate overview of pi based solely on the context that it is "the sixteenth letter of the Greek alphabet," as this describes only one aspect of pi. A complete overview would require additional context about pi's mathematical significance, which is not provided in your source material.
AI-generated from the Wikipedia summary — may contain errors.
History
Archaic local variants
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).