| Answer | Crossword Clue |
|---|---|
| RANK | Horizontal line on a chessboard |
| XAXIS | Horizontal line on a graph |
| XAXIS | Horizontal reference line on a graph |
| MAGNETICEQUATOR | Line on which a dip needle is horizontal |
| underscore | (on a computer or typewriter keyboard) A short horizontal line (_) on the baseline |
| underscores | (on a computer or typewriter keyboard) A short horizontal line (_) on the baseline |
