英文释义

n. (geometry) a straight line connecting any two vertices of a polygon that are not adjacent

n. a line or cut across a fabric that is not at right angles to a side of the fabric

n. an oblique line of squares of the same color on a checkerboard

n. (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