Topic summary
Υ
Extracted from the Wikipedia article Upsilon.
Upsilon (US: , UK: ; uppercase Υ, lowercase υ; Greek: ύψιλονýpsilon) or ypsilon is the twentieth letter of the Greek alphabet. In the system of Greek numerals, Υʹ has a value of 400. It is derived from the Phoenicianwaw (𐤅).