Source : Webster's Revised Unabridged Dictionary (1913)

Dactylozooid \Dac`tyl*o*zo"oid\, n. [Gr. da`ktylos finger + E.
   zooid.] (Zo["o]l.)
   A kind of zooid of Siphonophora which has an elongated or
   even vermiform body, with one tentacle, but no mouth. See
   {Siphonophora}.