| Answer | Crossword Clue |
|---|---|
| BILINEAR | Of two lines, in math. |
| YAXES | Vertical lines in math |
| SUMS | Some bottom lines, in math |
| CUSP | Where two branches of a curve meet, in math |
| INDIUM | Element with two deep-blue lines in its spectrum |
| REPEAT | What two dots and two lines mean, in music |
