The Collaborative International Dictionary of English v.0.48:

Echinozoa \E*chi`no*zo"a\ ([-e]*k[imac]`n[-o]*z[=o]"[.a]), n.
   pl. [NL., fr. Gr. 'echi^nos an echinus + zw^,on an animal.]
   (Zo["o]l.)
   The Echinodermata.
   [1913 Webster]