azimuth
Concise Oxford English Dictionary © 2008 Oxford University Press:
azimuth /ˈazɪməθ/
▶noun
- 1 Astronomy the horizontal component of the direction of a celestial object from the observer, expressed as an angular distance from the north or south point of the horizon.
- 2 the horizontal angle or direction of a compass bearing.
– derivatives
azimuthal /-ˈmjuːθ(ə)l/ adjective.
azimuthal /-ˈmjuːθ(ə)l/ adjective.
– origin ME: from OFr. azimut, from Arab. as-samt, from al ‘the’ + samt ‘way, direction’.
'azimuth' also found in these Oxford entries:

