Definition of tunicates:
(n) :
Any of very many chordate marine animals, of the subphyla Tunicata or Urochordata, including the sea squirts.
(adj) :
Of or pertaining to Tunicata or Urochordata.
(adj) :
(anatomy, botany) Enclosed in a tunic or mantle; covered or coated with layers.
(adj) :
(zoology) Having each joint buried in the preceding funnel-shaped one, as in certain antennae of insects.