The Collaborative International Dictionary of English v.0.48:

Ascidiozooid \As*cid`i*o*zo"oid\
   ([a^]s*s[i^]d`[i^]*[-o]*z[=o]"oid), n. [Ascidium + zooid.]
   (Zool.)
   One of the individual members of a compound ascidian. See
   Ascidioidea.
   [1913 Webster]