tracheotomy(n = noun.act) tracheostomy - a surgical operation that creates an opening into the trachea with a tube inserted to provide a passage for air; performed when the pharynx is obstructed by edema or cancer or other causes;
is a kind of operation, surgery, surgical operation, surgical procedure, surgical process
has parts: stoma

   The operation of making an opening into the windpipe. [1913 Webster]

tracheotomy, n. (also tracheostomy) (pl. -ies) an incision made in the trachea to relieve an obstruction to breathing.

Idiom:
tracheotomy tube a breathing-tube inserted into this incision.