Unicode: 2247. Alias: Esc !~== Esc. Infix similarity operator. x ≇ y is by default interpreted as NotTildeFullEqual[x,y].
NotGreaterFullEqual[x, y, ...] displays as x \[NotGreaterFullEqual] y \[NotGreaterFullEqual] ....
NotGreaterSlantEqual[x, y, ...] displays as x \[NotGreaterSlantEqual] y \[NotGreaterSlantEqual] ....
NotLeftTriangleEqual[x, y, ...] displays as x \[NotLeftTriangleEqual] y \[NotLeftTriangleEqual] ....
NotLessFullEqual[x, y, ...] displays as x \[NotLessFullEqual] y \[NotLessFullEqual] ....
NotLessSlantEqual[x, y, ...] displays as x \[NotLessSlantEqual] y \[NotLessSlantEqual] ....
NotPrecedesSlantEqual[x, y, ...] displays as x \[NotPrecedesSlantEqual] y \[NotPrecedesSlantEqual] ....
NotRightTriangleEqual[x, y, ...] displays as x \[NotRightTriangleEqual] y \[NotRightTriangleEqual] ....
NotSquareSubsetEqual[x, y, ...] displays as x \[NotSquareSubsetEqual] y \[NotSquareSubsetEqual] ....
NotSquareSupersetEqual[x, y, ...] displays as x \[NotSquareSupersetEqual] y \[NotSquareSupersetEqual] ....