Source : Webster's Revised Unabridged Dictionary (1913)

Nemertina \Nem`er*ti"na\, n. pl. [NL. See {Nemrtes}.] (Zo["o]l.)
   An order of helminths usually having a long, slender, smooth,
   often bright-colored body, covered with minute vibrating
   cilia; -- called also {Nemertea}, {Nemertida}, and
   {Rhynchoc[oe]la}.

   Note: The mouth is beneath the head, and the straight
         intestine at the posterior and. They have a very
         singular long tubular proboscis, which can be everted
         from a pore in the front of the head. Their nervous
         system and blood vessels are well developed. Some of
         the species become over one hundred feet long. They are
         mostly marine and seldom parasitic; a few inhabit fresh
         water. the two principal divisions are Anopla and
         Enopla.

Source : WordNet®

Nemertina
     n : proboscis worms [syn: {Nemertea}, {phylum Nemertea}, {phylum
         Nemertina}]