diagonal (noun)

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

diagonal, bias (noun)

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

diagonal (noun)

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

"the bishop moves on the diagonals"

diagonal (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

solidus, slash, virgule, diagonal, stroke, separatrix (adj)

a punctuation mark (/) used to separate related items of information

diagonal (adj)

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"

aslant, aslope, diagonal, slanted, slanting, sloped, sloping (adj)

having an oblique or slanted direction

diagonal (Noun)

something arranged diagonally or obliquely

diagonal (Noun)

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

diagonal (Noun)

a punctuation mark used to separate related items of information

diagonal (Noun)

a diagonal line or plane

diagonal (Noun)

a line joining non-adjacent vertices of a polygon.

diagonal (Adjective)

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

diagonal (Adjective)

Having a slanted or oblique direction, lines or markings.

diagonal (Adjective)

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

Diagonal

A diagonal is a line joining two nonconsecutive vertices of a polygon or polyhedron. Informally, any sloping line is called diagonal. The word "diagonal" derives from the ancient Greek διαγώνιος diagonios, "from angle to angle"; it was used by both Strabo and Euclid to refer to a line connecting two vertices of a rhombus or cuboid, and later adopted into Latin as diagonus. In mathematics, in addition to its geometric meaning, a diagonal is also used in matrices to refer to a set of entries along a diagonal line.