In elementary geometry, pertaining to or involving right angles or perpendiculars.
Ardâkonj, from ardâ-, → ortho-, + konj "angle, corner, confined place" (variants xong "corner, angle," Tabari kânj, Kurd. kunj, Hamadâni kom), maybe from the PIE base *g(e)neu-, as above, and related to Mod.Pers. zânu "knee" (Av. žnu-), Skt. kona- "angle, corner," Gk. gony, gonia, L. cuneus "a wedge," Albanian (Gheg dialect) kân "angle, corner," Albanian (Toks) kënd "angle, corner."
Fr.: fonctions orthogonales
A set of functions, any two of which, by analogy to orthogonal vectors, vanish if their product is summed by integration over a specified interval.
Fr.: droites orthogonales
Fr.: trajectoire orthogonale
Math.: An → isogonal trajectory where the family of curves are cut at right angles.
Fr.: vecteurs orthogonaux
Two non-zero vectors which are perpendicular, i.e. their → scalar product is zero.
1) The property of → orthogonal functions.