Source : Webster's Revised Unabridged Dictionary (1913)

Pang \Pang\, n. [Prob. for older prange. Cf. {Prong}.]
   A paroxysm of extreme pain or anguish; a sudden and
   transitory agony; a throe; as, the pangs of death.

   Syn: Agony; anguish; distress. See {Agony}.

Pang \Pang\, v. t.
   To torture; to cause to have great pain or suffering; to
   torment. [R.] --Shak.

Source : WordNet®

pang
     n 1: a sudden sharp feeling; "pangs of regret"; "she felt a stab
          of excitement"; "twinges of conscience" [syn: {stab}, {twinge}]
     2: a mental pain or distress; "a pang of conscience" [syn: {sting}]
     3: a sharp spasm of pain