The Collaborative International Dictionary of English v.0.48:

Vesicularia \Ve*sic`u*la"ri*a\, n. [NL. See Vesicle.] (Zool.)
   Any one of numerous species of marine Bryozoa belonging to
   Vesicularia and allied genera. They have delicate tubular
   cells attached in clusters to slender flexible stems.
   [1913 Webster]