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trematodea

trematodea


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Trematodea  \Trem`a*to"de*a\,  n.  pl  [NL.,  from  Gr  ?  having 
  holes,  from  ?,  ?,  a  hole.]  (Zo["o]l.) 
  An  extensive  order  of  parasitic  worms.  They  are  found  in  the 
  internal  cavities  of  animals  belonging  to  all  classes.  Many 
  species  are  found  also  on  the  gills  and  skin  of  fishes.  A 
  few  species  are  parasitic  on  man,  and  some  of  which  the 
  fluke  is  the  most  important,  are  injurious  parasites  of 
  domestic  animals.  The  trematodes  usually  have  a  flattened 
  body  covered  with  a  chitinous  skin,  and  are  furnished  with 
  two  or  more  suckers  for  adhesion.  Most  of  the  species  are 
  hermaphrodite.  Called  also  {Trematoda},  and  {Trematoidea}. 
  See  {Fluke},  {Tristoma},  and  {Cercaria}.