Di*ag"o*nal (?), n.
1. 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.
2. (Engin.) A member, in a framed structure, running obliquely across a panel.
3. A diagonal cloth; a kind
of cloth having diagonal stripes,
ridges, or welts made in the weaving.
Di*ag"o*nal (?), a. [L. diagonalis, fr. Gr. &?; from to angle; dia` through + &?; an angle; perh. akin to E. knee: cf. F. diagonal.]
(Geom.) 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 (Masonry),
herringbone work. See Herringbone,
a. -- Diagonal built (Shipbuilding), built by forming the outer skin of
two layers of planking, making angles of about 45° with the keel, in opposite directions. -- Diagonal cleavage.
See under Cleavage. -- Diagonal molding (Arch.), a chevron or zigzag molding. -- Diagonal rib. (Arch.) See Cross- springer. --
Diagonal scale,
a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their
intersections furnish smaller subdivisions of the unit of measure than could be
conveniently marked
on a plain scale. -- Diagonal stratification. (Geol.) Same as Cross bedding, under Cross, a.
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