a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement | a punctuation mark (/) used to separate related items of information |
| an oblique line of squares of the same color on a checkerboard |
| (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry |
| a line or cut across a fabric that is not at right angles to a side of the fabric |
| (geometry) a straight line connecting any two vertices of a polygon that are not adjacent |