Source : Webster's Revised Unabridged Dictionary (1913)

Scarlet \Scar"let\, a.
   Of the color called scarlet; as, a scarlet cloth or thread.

   {Scarlet admiral} (Zo["o]l.), the red admiral. See under
      {Red}. -- Scarlet bean (Bot.), a kind of bean ({Phaseolus
      multiflorus}) having scarlet flowers; scarlet runner.

   {Scarlet fever} (Med.), a contagious febrile disease
      characterized by inflammation of the fauces and a scarlet
      rash, appearing usually on the second day, and ending in
      desquamation about the sixth or seventh day.

   {Scarlet fish} (Zo["o]l.), the telescope fish; -- so called
      from its red color. See under {Telescope}.

   {Scarlet ibis} (Zo["o]l.) See under {Ibis}.

   {Scarlet maple} (Bot.), the red maple. See {Maple}.

   {Scarlet mite} (Zo["o]l.), any one of numerous species of
      bright red carnivorous mites found among grass and moss,
      especially {Thombidium holosericeum} and allied species.
      The young are parasitic upon spiders and insects.

   {Scarlet oak} (Bot.), a species of oak ({Quercus coccinea})
      of the United States; -- so called from the scarlet color
      of its leaves in autumn.

   {Scarlet runner} (Bot.), the scarlet bean.

   {Scarlet tanager}. (Zo["o]l.) See under {Tanager}.

Source : WordNet®

scarlet runner
     n 1: tropical American high-climbing bean with red flowers and
          mottled black beans similar to Phaseolus vulgaris but
          perennial; a preferred food bean in Great Britain [syn:
          {scarlet runner bean}, {Dutch case-knife bean}, {runner
          bean}, {Phaseolus coccineus}, {Phaseolus multiflorus}]
     2: hairy trailing or prostrate western Australian vine with
        bright scarlet-pink flowers [syn: {running postman}, {Kennedia
        prostrata}]
     3: long bean pods always sliced into half-inch lengths; a
        favorite in Britain [syn: {scarlet runner bean}, {runner
        bean}, {English runner bean}]