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Webster's Dictionary (1865)

3 entries under this word

Diagonal

Dī-ăg'o-nal, a.

adjective

a. [Lat. diagonalis, from Gr. διαγώνιος, from angle to angle, from διά, through, and γωνία, an angle, Fr. diagonal.] (Geom.) Joining two not adjacent angles of a quadrilateral or multilateral figure, and dividing it into two parts; hence, crossing at an angle with one of the sides.

Diagonal scale, a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections indicate smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale.

A diagonal scale with a subdivided grid and numbered intervals.
Diagonal Scale.

Di-ăg'o-nal, n.

noun

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.

A rectangle with a diagonal line running from its lower-left corner to its upper-right corner.
Diagonal.

Dī'a-gō'ni-al, a.

adjective

a. Diagonal; diametrical; hence, diametrically opposed. [Obs.]

Sin can have no tenure by law at all, but is rather an eternal outlaw, and in hostility with law past all atonement; both diagonal contraries, as much allowing one another as day and night together in one hemisphere. Milton.