Heterocercal

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Heterocercal \Het`er*o*cer"cal\, a. [Hetero- + Gr. ? tail.]
     (Anat.)
     Having the vertebral column evidently continued into the
     upper lobe of the tail, which is usually longer than the
     lower one, as in sharks.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  heterocercal
       adj : possessing a tail with the upper lobe larger than the lower
             and with the vertebral column prolonged into the upper
             lobe [ant: {homocercal}]