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  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Eudiometer  \Eu`di*om"e*ter\,  n.  [Gr.  ?  fair,  clear  weather,  fr 
  ?  fine,  clear  (  said  of  the  air  or  weather)  +  -meter:  cf  F. 
  ediom[`e]tre.]  (Chem.) 
  An  instrument  for  the  volumetric  measurement  of  gases;  --  so 
  named  because  frequently  used  to  determine  the  purity  of  the 
  air. 
 
  Note:  It  usually  consists  of  a  finely  graduated  and 
  calibrated  glass  tube,  open  at  one  end  the  bottom;  and 
  having  near  the  top  a  pair  of  platinum  wires  fused  in 
  to  allow  the  passage  of  an  electric  spark,  as  the 
  process  involves  the  explosion  and  combustion  of  one  of 
  the  ingredients  to  be  determined.  The  operation  is 
  conducted  in  a  trough  of  mercury,  or  sometimes  over 
  water.  Cf  {Burette}.  Ure's  eudiometer  has  the  tube 
  bent  in  the  form  of  the  letter.  U. 
 
  From  WordNet  r  1.6  [wn]: 
 
  eudiometer 
  n  :  a  graduated  glass  tube  for  measuring  volume  changes  in 
  chemical  reactions  between  gases 

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