Code point
U+2AA3
Glyph appearance depends on your fonts.
U+2AA3
SmU+2AA3 DOUBLE NESTED LESS-THAN WITH UNDERBAR is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Supplemental Mathematical Operators block.
Choose the representation you need, then copy its value.
U+2AA3
10915
⪣
⪣
E2 AA A3
2AA3
00002AA3
%E2%AA%A3
\u2AA3
\u2AA3
\u2AA3
\2AA3