orthonormal

adjective

or·​tho·​nor·​mal ˌȯr-thə-ˈnȯr-məl 

1

of real-valued functions : orthogonal with the integral of the square of each function over a specified interval equal to one

2

: being or composed of orthogonal elements of unit length

orthonormal basis of a vector space

Word History

First Known Use

1928, in the meaning defined at sense 2