Definitions for "Diagonal"
Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides.
A right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts.
A line segment connecting two nonadjacent vertices in a polygon.
In a refractor or catadioptric telescope, a mirror or prism used with that is used to turn the viewing axis 90 or 45 degrees to make it easier to veiw from behind the scope. In a Newtonian telescope, a diagonal is the mirror placed near the front of the telescope that reflects the collected light out the side of the tube, where the focuser and eyepiece are located.
A diagonal is a mirror (or sometimes a prism) placed in the optical path of a telescope which reflects incoming light at a 90-degree angle in order to bring the light to a convenient position. back to the top
An optic accessory with a mirror or prism used to place an eyepiece in a comfortable position for the observer using a telescope and to re-arrange the orientation of the image.
A member, in a framed structure, running obliquely across a panel.
A member running obliquely across the panel of a truss. Any oblique line.
an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"
Keywords:  matrix, left, upper, lower, right
(1) An arrangement of objects or numbers from upper left to lower right or from lower left to upper right in an array or table.
A diagonal matrix has its only non-zero elements on the main diagonal.
(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
Keywords:  welts, stripes, ridges, weaving, kind
A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving.
Keywords:  vector, extract, column
Extract diagonal into column vector
a punctuation mark (/) used to separate related items of information
Represents a “/ ” in transmission of information