diagonal
nounEtymology From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”), from διά (diá, “across”) + γωνία (gōnía, “angle”).
1
Geometry, Mathematics, Sciences A line joining non-adjacent vertices of a polygon.
› Anything forming or resembling such a line
2
Geometry, Mathematics, Sciences A line or plane at an oblique angle to another.
3
Fashion, Lifestyle A line or cut across a fabric at an oblique angle to its sides.
4
Media, Publishing, Typography Uncommon Synonym of slash ⟨/⟩.
- Initial inquiries among professional typists uncover names like slant, slant line, slash, and slash mark. Examination of typing instruction manuals discloses additional names such as diagonal and diagonal mark, and other sources provide the designation oblique.1965, Dmitri A. Borgmann, Language on Vacation, page 240:
- Antonyms
- backslash
- Derived terms
- antidiagonal, broken diagonal, counterdiagonal, diagonal argument, diagonal calendar, diagonal element, diagonalization, diagonalize, diagonally, diagonal mark, diagonal matrix, diagonal morphism, diagonal scale, diagonal spread, leading diagonal, main diagonal, minor diagonal, secondary diagonal, space diagonal