Electrical ground symbol, a vertical line over stacked shrinking horizontal lines, used in circuit diagrams and schematics for earth grounding.
U+23D9METRICAL PENTASEMEU+23DBFUSEU+23D8METRICAL TETRASEMEU+23DCTOP PARENTHESISU+23D7METRICAL TRISEMEU+23DDBOTTOM PARENTHESISU+23D6METRICAL TWO SHORTS JOINEDU+23DETOP CURLY BRACKETU+23D5METRICAL TWO SHORTS OVER LONGU+23DFBOTTOM CURLY BRACKETU+23D4METRICAL LONG OVER TWO SHORTSU+23E0TOP TORTOISE SHELL BRACKET256 characters in the Miscellaneous Technical Unicode block, from number 219.
U+23DAEARTH GROUNDU+23DBFUSEU+23DCTOP PARENTHESISU+23DDBOTTOM PARENTHESISU+23DETOP CURLY BRACKETU+23DFBOTTOM CURLY BRACKETU+23E0TOP TORTOISE SHELL BRACKETU+23E1BOTTOM TORTOISE SHELL BRACKETU+23E2WHITE TRAPEZIUMU+23E3BENZENE RING WITH CIRCLEU+23E4STRAIGHTNESSU+23E5FLATNESSU+23E6AC CURRENTU+23E7ELECTRICAL INTERSECTIONU+23E8DECIMAL EXPONENT SYMBOLU+23E9BLACK RIGHT-POINTING DOUBLE TRIANGLEU+23EABLACK LEFT-POINTING DOUBLE TRIANGLEU+23EBBLACK UP-POINTING DOUBLE TRIANGLEU+23ECBLACK DOWN-POINTING DOUBLE TRIANGLEU+23EDBLACK RIGHT-POINTING DOUBLE TRIANGLE WITH VERTICAL BARU+23EEBLACK LEFT-POINTING DOUBLE TRIANGLE WITH VERTICAL BARU+23EFBLACK RIGHT-POINTING TRIANGLE WITH DOUBLE VERTICAL BARU+23F0ALARM CLOCKU+23F1STOPWATCHU+23F2TIMER CLOCKU+23F3HOURGLASS WITH FLOWING SANDU+23F4BLACK MEDIUM LEFT-POINTING TRIANGLEU+23F5BLACK MEDIUM RIGHT-POINTING TRIANGLEU+23F6BLACK MEDIUM UP-POINTING TRIANGLEU+23F7BLACK MEDIUM DOWN-POINTING TRIANGLEU+23F8DOUBLE VERTICAL BARU+23F9BLACK SQUARE FOR STOPU+23FABLACK CIRCLE FOR RECORDU+23FBPOWER SYMBOLU+23FCPOWER ON-OFF SYMBOLU+23FDPOWER ON SYMBOLU+23FEPOWER SLEEP SYMBOLU+23FFOBSERVER EYE SYMBOL