Source : Webster's Revised Unabridged Dictionary (1913)

Malacopoda \Mal`a*cop"o*da\, n. pl. [NL., fr. Gr. ? soft +
   -poda.] (Zo["o]l.)
   A class of air-breathing Arthropoda; -- called also
   {Protracheata}, and {Onychophora}.

   Note: They somewhat resemble myriapods, and have from
         seventeen to thirty-three pairs of short, imperfectly
         jointed legs, two pairs of simple jaws, and a pair of
         antenn[ae]. The tranche[ae] are connected with numerous
         spiracles scattered over the surface of the body.
         {Peripatus} is the only known genus. See {Peripatus}.

Onychophora \On`y*choph"o*ra\, n. pl. [NL., from Gr. ?, ?, a
   claw + ?.] (Zo["o]l.)
   Malacopoda.

Source : WordNet®

Onychophora
     n : enigmatic small elongated wormlike terrestrial invertebrates
         of damp dark habitats in warm regions; distinct from the
         phylum Annelida; resemble slugs with legs and are
         sometimes described as the missing link between
         arthropods and annelids [syn: {class Onychophora}]