• Webster's Revised Unabridged Dictionary
    • n Turbellarian (Zoöl) One of the Turbellaria. Also used adjectively.
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Century Dictionary and Cyclopedia
    • turbellarian Causing little currents or vortexes of water by ciliary action, as the more minute members of the class Turbellaria; belonging to this class, as a worm.
    • n turbellarian A member of the class Turbellaria.
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In literature:

The third stage in our ancestral series is the turbellarian.
"The Whence and the Whither of Man" by John Mason Tyler
These speculations are founded on a comparison of the condition of the mouth in Turbellarians and Nemertines.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour