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abscissa

## abscissa

```  3  definitions  found

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

Abscissa  \Ab*scis"sa\,  n.;  E.  pl  {Abscissas},  L.  pl
{Absciss[ae]}.  [L.,  fem.  of  abscissus  p.  p.  of  absindere  to
cut  of  See  {Abscind}.]  (Geom.)
One  of  the  elements  of  reference  by  which  a  point,  as  of  a
curve,  is  referred  to  a  system  of  fixed  rectilineal
co["o]rdinate  axes.

Note:  When  referred  to  two  intersecting  axes,  one  of  them
called  the  axis  of  abscissas,  or  of  X,  and  the  other
the  axis  of  ordinates,  or  of  Y,  the  abscissa  of  the
point  is  the  distance  cut  off  from  the  axis  of  X  by  a
line  drawn  through  it  and  parallel  to  the  axis  of  Y.
When  a  point  in  space  is  referred  to  three  axes  having
a  common  intersection,  the  abscissa  may  be  the  distance
measured  parallel  to  either  of  them  from  the  point  to
the  plane  of  the  other  two  axes.  Abscissas  and
ordinates  taken  together  are  called  co["o]rdinates.  --
OX  or  PY  is  the  abscissa  of  the  point  P  of  the  curve,
OY  or  PX  its  ordinate,  the  intersecting  lines  OX  and  OY
being  the  axes  of  abscissas  and  ordinates  respectively,
and  the  point  O  their  origin.

From  WordNet  r  1.6  [wn]:

abscissa
n  :  the  value  of  a  coordinate  on  the  x-axis

From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]:

abscissa

The  x  coordinate  on  an  (x,  y)  graph;  the  input  of
a  function  against  which  the  output  is  plotted.

y  is  the  "{ordinate}".

See  {Cartesian  coordinates}.

(1997-07-08)

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