What is the meaning of Ypsilon?

Alternative form of upsilon

The name of the Latin-script letter Y/y.

upsilon

upsilon, Υ, υ (letter of the Greek alphabet)

upsilon

Y, wye (Latin letter)

upsilon (Greek letter)

Alternative form of ipsilon

A name of the letter Y.

The name of the Latin-script letter Y/y.

upsilon

Source: wiktionary.org