Source : Webster's Revised Unabridged Dictionary (1913)

Intubation \In`tu*ba"tion\, n. [Pref. in- in + tube.] (Med.)
   The introduction of a tube into an organ to keep it open, as
   into the larynx in croup.

Source : WordNet®

intubation
     n : the insertion of a cannula or tube into a hollow body organ
         [syn: {cannulation}, {canulation}, {cannulization}, {cannulisation},
          {canulization}, {canulisation}]