noun
definition
An orthogonal line
adjective
definition
Of two objects, at right angles; perpendicular to each other.
example
A chord and the radius that bisects it are orthogonal.
definition
Of a pair of vectors: having a zero inner product; perpendicular.
example
The normal vector and tangent vector at a given point are orthogonal.
definition
Of a square matrix: such that its transpose is equal to its inverse.
definition
Of a linear transformation: preserving its angles.
definition
Of grid graphs, board games and polyominoes: vertical or horizontal but not diagonal.
definition
Of a pair of elements in an ortholattice: each less than or equal to the orthocomplement of the other.
definition
Statistically independent, with reference to variates.
definition
Of two or more aspects of a problem, able to be treated separately.
example
The content of the message should be orthogonal to the means of its delivery.
definition
Of two or more problems or subjects, independent of or irrelevant to each other.