en.wikipedia.org/wiki/Orthogonality

In **mathematics**, **orthogonality** is the generalization of the notion of
perpendicularity to the linear ... In certain cases, the word normal is used to **mean**
**orthogonal**, particularly in the geometric sense as in the normal to a surface. .....
spacing needed to make them **orthogonal** so that they **do** not interfere with each
other.

mathworld.wolfram.com/Orthogonal.html

In elementary geometry, **orthogonal** is the same as perpendicular. Two lines or
curves are **orthogonal** if they are perpendicular at their point of intersection.

mathworld.wolfram.com/OrthogonalVectors.html

(i.e., the vectors are perpendicular) are said to be **orthogonal**. ... From MathWorld
--A Wolfram Web Resource. http://mathworld.wolfram.com/**OrthogonalVectors**.

www.mathopenref.com/orthogonal.html

In geometry, the word '**orthogonal**' simply **means** 'at right angles'. We also
sometimes say they are 'normal' to each other. Strictly speaking, the lines **do** not
have ...

www.britannica.com/topic/orthogonality

**orthogonality**: In **mathematics**, a property synonymous with perpendicularity
when ... or functions can serve as the basis of an inner product space, **meaning**
that any ... Computer once meant a person who **did** computations, but now the
term ...

searchstorage.techtarget.com/definition/orthogonal

Mar 10, 2015 **...** **Orthogonal** concepts have origins in advanced **mathematics**, particularly ... Thus,
motion by one vector along an **orthogonal** X-Y axis **does** not ...

math.stackexchange.com/questions/1065563/mutually-orthogonal-set-of-vectors

Dec 12, 2014 **...** Here, the result follows from the **definition** of "mutually **orthogonal**". A set of
vectors is said to be mutually **orthogonal** if the dot product of any ...

onlinemschool.com/math/library/vector/orthogonality

**Orthogonal** vectors - **definition**; Condition of vectors **orthogonality**; Examples of
tasks ... Two vectors a and b are **orthogonal**, if their dot product is equal to zero.

math.stackexchange.com/questions/1176941/what-does-orthogonality-mean-in-function-space/1177049

Mar 5, 2015 **...** In such spaces, the notion of "**orthogonal** functions" is interpreted .... It **does** not
**mean** that the graphs are geometrically **orthogonal** in any way; ...