A tornaria is the planktonic larva of some species of Hemichordata. It is very similar in appearance to the bipinnaria larvae of starfishes, with convoluted bands of cilia running around the body. ...
• (n.) The peculiar free swimming larva of Balanoglossus. See Illust. in Append.
Tor·na'ri·a noun ; plural Tornariæ . [ New Latin , from Latin tornare to turn.] (Zoology) The peculiar free swimming larva of Balanoglossus. See Illust. in Append.