Urochord

2 definitions found

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

  Urochord \U"ro*chord\, n. [2d uro- + chord.] (Zool.)
     The central axis or cord in the tail of larval ascidians and
     of certain adult tunicates. [Written also {urocord}.]
     [1913 Webster] Urochorda

From WordNet (r) 2.0 [wn]:



  urochord
       n 1: primitive marine animal having a saclike unsegmented body
            and a urochord (a notochord) conspicuous in the larva
            [syn: {tunicate}, {urochordate}]
       2: a notochord of a larval tunicate typically confined to the
          caudal region