Upside Down Y Symbol

What's the icon, do it backwards .Y.? 3

At first I thought it was a symbol of India, but it is not. There may not be such a thing, but it is very important. If anyone knows anything please let me know ... please!

This is the Greek lambda in the lower case. Is this the symbol you mean?

Make Y in reverse

Upside Down Y Symbol

Well, according to Google, the letter Y means man, but otherwise it means Y, although the reference is not very specific about where this meaning comes from if it is based on a particular book or website. Is.
This page can help you.
D:
.Y. What is the opposite symbol?
At first I thought it was a symbol of India, but it is not. That may not be the case, but it is very important. If anyone knows anything please let me know ... please!
It could be Greece. Used for wavelength in science.