The Collaborative International Dictionary of English v.0.48:

Ixtle \Ix"tle\, Ixtli \Ix"tli\([i^]x"tl[-e]), n.
   1. (Bot.) A Mexican name for a variety of Agave rigida,
      which furnishes a strong coarse fiber; also, the fiber
      itself, which is called also pita, and Tampico fiber.
      [Written also istle.]
      [1913 Webster] Ixtle

The Collaborative International Dictionary of English v.0.48:

Pita \Pi"ta\, n. [Sp.] (Bot.)
      (a) A fiber obtained from the Agave Americana and other
          related species, -- used for making cordage and paper.
          Called also pita fiber, and pita thread.
      (b) The plant which yields the fiber.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pita \Pi"ta\ (p[=e]"t[.a]), Pita bread \Pi"ta bread`\, n. [Sp.]
   A thin flat bread that is formed in two layers, to make a
   pocket into which other foods may be placed.
   [PJC]

WordNet (r) 3.0 (2006):

pita
    n 1: usually small round bread that can open into a pocket for
         filling [syn: pita, pocket bread]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PITA
       Pain In The Anatomy / Ass (slang, Usenet, IRC)


The Free On-line Dictionary of Computing (30 December 2018):

PITA

   Pain in the arse/ass.