The Collaborative International Dictionary of English v.0.48:
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] UrochordaThe Collaborative International Dictionary of English v.0.48:
Urocord \U"ro*cord\, n. (Zool.) See Urochord. [1913 Webster]