Source : Webster's Revised Unabridged Dictionary (1913)

Dendrocoela \Den`dro*c[oe]"la\, n. pl. [NL., fr. Gr. de`ndron
   tree + koi^los hollow.] (Zo["o]l.)
   A division of the Turbellaria in which the digestive cavity
   gives off lateral branches, which are often divided into
   smaller branchlets.