Tethioidea

1 definition found

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

  Tethyodea \Te`thy*o"de*a\, n. pl. [NL., fr. Tethys + Gr. e'i^dos
     form.] (Zool.)
     A division of Tunicata including the common attached
     ascidians, both simple and compound. Called also
     {Tethioidea}.
     [1913 Webster]