Source : Webster's Revised Unabridged Dictionary (1913)

Janizary \Jan"i*za*ry\, n.; pl. {Janizaries}. [F. janissaire,
   fr. Turk. ye?i-tsheri new soldiers or troops.]
   A soldier of a privileged military class, which formed the
   nucleus of the Turkish infantry, but was suppressed in 1826.
   [written also {janissary}.]