An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

Any of the four principal directions or points of the compass, → north, → east, → south, and → west. See also: → cardinal point.

→ cardinal; → direction.

1) A position to which motion or another position is referred.
2) The act or an instance of directing.

M.E. direccioun, from M.Fr., from L. direction-, stem of directio "arranging in line, straightening," → direct.

1) Râstâ, from direct→ direct + -â dimension suffix; su, from Mid.Pers. sôk "side."
2) Râštâri, noun from râštâr→ director + suffix -i.

An angle made by a given vector and a coordinate axis.
The angle between the North and a chosen direction.

→ direct; → angle.