### Definition of Diagonal

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

Category relationships: Geometry
Generic synonyms: Straight Line

2. Adjective. Connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face. "A diagonal line across the page"
Similar to: Oblique

3. Noun. A line or cut across a fabric that is not at right angles to a side of the fabric.
Exact synonyms: Bias
Generic synonyms: Straight Line

4. Adjective. Having an oblique or slanted direction.
Exact synonyms: Aslant, Aslope, Slanted, Slanting, Sloped, Sloping
Similar to: Inclined

5. Noun. An oblique line of squares of the same color on a checkerboard. "The bishop moves on the diagonals"
Group relationships: Checker Board, Checkerboard
Specialized synonyms: Main Diagonal, Principal Diagonal, Secondary Diagonal
Generic synonyms: Line, Line

6. Noun. (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.
Category relationships: Math, Mathematics, Maths
Generic synonyms: Set
Group relationships: Square Matrix
Derivative terms: Diagonalise, Diagonalize

7. Noun. A punctuation mark (/) used to separate related items of information.
Exact synonyms: Separatrix, Slash, Solidus, Stroke, Virgule
Generic synonyms: Punctuation, Punctuation Mark

### Definition of Diagonal

1. a. 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.

2. n. 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.

### Definition of Diagonal

1. Adjective. (geometry) Joining two nonadjacent vertices (of a polygon or polyhedron). ¹

2. Adjective. Having a slanted or oblique direction, lines or markings. ¹

3. Adjective. Pertaining to the front left and back right (or the front right and back left) legs of a quadruped. ¹

4. Noun. something arranged diagonally or obliquely ¹

5. Noun. a line or cut across a fabric that is not at right angles to a side of the fabric ¹

6. Noun. a punctuation mark used to separate related items of information ¹

7. Noun. (geometry) a diagonal line or plane ¹

8. Noun. (geometry) a line joining non-adjacent vertices of a polygon. ¹

¹ Source: wiktionary.com

### Definition of Diagonal

1. an oblique line [n -S]

### Medical Definition of Diagonal

1. 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. Diagonal bond Same as Cross bedding, under Cross. Origin: L. Diagonalis, fr. Gr. From to angle; through + an angle; perh. Akin to E. Knee: cf. F. Diagonal. Source: Websters Dictionary (01 Mar 1998)

### Diagonal Pictures

Click the following link to bring up a new window with an automated collection of images related to the term: Diagonal Images

### Lexicographical Neighbors of Diagonal

 diagnostic techniques and proceduresdiagnostic testdiagnostic ultrasounddiagnosticaldiagnosticallydiagnosticatediagnosticateddiagnosticatesdiagnosticatingdiagnostician diagnosticiansdiagnostickdiagnosticsdiagometerdiagometersdiagonal (current term)diagonal elementdiagonal elementsdiagonal matrixdiagonal section diagonalis striadiagonalisabilitydiagonalisationdiagonalisationsdiagonalisediagonaliseddiagonalisesdiagonalising

### Literary usage of Diagonal

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Text-book of Mineralogy: With an Extended Treatise on Crystallography and by Edward Salisbury Dana (1898)
"The diagonal pyramid, or pyramid of the second order (Fig. 200), is a double six-sided pyramid including the twelve similar faces which have the same ..."

2. The Principles and Practice of Surveying by Charles Blaney Breed, George Leonard Hosmer (1908)
"diagonal Scale. — If a scale is desired in which it is unnecessary to estimate the fractional part of the small spaces, so that no uncertainty shall be ..."

3. A Treatise on Concrete, Plain and Reinforced: Materials, Construction, and by Frederick Winslow Taylor, Sanford Eleazer Thompson, René Feret, William Barnard Fuller, Frank Pape McKibben, Spencer Baird Newberry (1916)
"diagonal Tension in Simply Supported Beams. In simply supported beams, diagonal tension cracks start at the bottom of the beam, not at the support where the ..."

4. The Design of Walls, Bins, and Grain Elevators by Milo Smith Ketchum (1911)
"265, 1905 edition) it is shown that shear and tensile stresses combine to cause diagonal tensile stresses. where t is the diagonal tensile unit stress, ..."

5. Gothic Architecture in England: An Analysis of the Origin & Development of by Francis Bond (1906)
"Compare the arch on AB or on any one of the sides of the square with the arch on the diagonal AD or BC. It was this type of groined vault that was usually ..."

6. Abstracts of the Papers Printed in the Philosophical Transactions of the by Royal Society (Great Britain) (1833)
"On the great Strength given to Ships of War by the application of diagonal Braces. By Robert Seppings, Esq. FRS Read November 27, 1817. [Phil. Trans. ..."

7. Transactions of the American Institute of Mining, Metallurgical and (1913)
"THE James diagonal-plane slimer is specially adapted to handle the finest ... Tliis double concentration performed by the diagonal-plane deck produces ..."