Source : Webster's Revised Unabridged Dictionary (1913)

Sallet \Sal"let\, Salleting \Sal"let*ing\, n.
   Salad. [Obs.] --Shak.

Sallet \Sal"let\ (s[a^]l"l[e^]t), n. [F. salade, Sp. celada, or
   It. celata, fr. L. (cassis) caelata, fr. caelare, caelatum,
   to engrave in relief. So called from the figures engraved
   upon it.]
   A light kind of helmet, with or without a visor, introduced
   during the 15th century. [Written also {salade}.]

         Then he must have a sallet wherewith his head may be
         saved.                                   --Latimer.

Source : WordNet®

sallet
     n : a light medieval helmet with a slit for vision [syn: {sallade}]