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leptocardia

leptocardia


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Leptocardia  \Lep`to*car"di*a\  (l[e^]p`t[-o]*k[aum]r"d[i^]*[.a]), 
  n.  pl  [NL.,  fr  Gr  lepto`s  small  +  kardi`a  the  heart.] 
  (Zo["o]l.) 
  The  lowest  class  of  Vertebrata,  including  only  the  Amphioxus. 
  The  heart  is  represented  only  by  a  simple  pulsating  vessel. 
  The  blood  is  colorless;  the  brain,  renal  organs,  and  limbs 
  are  wanting,  and  the  backbone  is  represented  only  by  a 
  simple,  unsegmented  notochord.  See  {Amphioxus}.  [Written  also 
  {Leptocardii}.]