1) Tunicate 2) Urochord 3) Urochordate 
[plant] Appendicularia DC. is a botanic genus of the family Melastomataceae. == Species == The genus has two species: ...
• (n.) A genus of small free-swimming Tunicata, shaped somewhat like a tadpole, and remarkable for resemblances to the larvae of other Tunicata. It is the type of the order Copelata or Larvalia. See Illustration in Appendix.
Ap`pen·dic`u·la'ri·a noun [ New Latin ] (Zoology) A genus of small free-swimming Tunicata, shaped somewhat like a tadpole, and remarkable for resemblances to the larvæ of other Tunicata. It is the type of the order Copelata or Larvalia. See Illustration in Appendix. 
[n] - free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates
noun free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates