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azimuth

## azimuth

```  2  definitions  found

From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]:

Azimuth  \Az"i*muth\,  n.  [OE.  azimut,  F.  azimut,  fr  Ar
as-sum?t,  pl  of  as-samt  a  way  or  perh.,  a  point  of  the
horizon  and  a  circle  extending  to  it  from  the  zenith,  as
being  the  Arabic  article:  cf  It  azzimutto  Pg  azimuth,  and
Ar  samt-al-r[=a]'s  the  vertex  of  the  heaven.  Cf  {Zenith}.]
(Astron.  &  Geodesy)
a  The  quadrant  of  an  azimuth  circle.
b  An  arc  of  the  horizon  intercepted  between  the  meridian
of  the  place  and  a  vertical  circle  passing  through  the
center  of  any  object;  as  the  azimuth  of  a  star;  the
azimuth  or  bearing  of  a  line  surveying.

Note:  In  trigonometrical  surveying,  it  is  customary  to  reckon
the  azimuth  of  a  line  from  the  south  point  of  the
horizon  around  by  the  west  from  0[deg]  to  360[deg].

{Azimuth  circle},  or  {Vertical  circle},  one  of  the  great
circles  of  the  sphere  intersecting  each  other  in  the
zenith  and  nadir,  and  cutting  the  horizon  at  right  angles.
--Hutton.

{Azimuth  compass},  a  compass  resembling  the  mariner's
compass,  but  having  the  card  divided  into  degrees  instead
of  rhumbs,  and  having  vertical  sights;  used  for  taking  the
magnetic  azimuth  of  a  heavenly  body,  in  order  to  find  by
comparison  with  the  true  azimuth,  the  variation  of  the
needle.

{Azimuth  dial},  a  dial  whose  stile  or  gnomon  is  at  right
angles  to  the  plane  of  the  horizon.  --Hutton.

{Magnetic  azimuth},  an  arc  of  the  horizon,  intercepted
between  the  vertical  circle  passing  through  any  object  and
the  magnetic  meridian.  This  is  found  by  observing  the
object  with  an  azimuth  compass.

From  WordNet  r  1.6  [wn]:

azimuth
n  :  the  azimuth  of  a  celestial  body  is  the  angle  between  the
vertical  plane  containing  it  and  the  plane  of  the
meridian  [syn:  {AZ}]
```