tracheotomy

n (medical 医) operation to cut a hole in the trachea, esp to help breathing 气管切开术.

townee, townsfolk, `townspeople, township, townsman, toxaemia (also toxemia), toxic, toxicity, toxicologist, toxicology, toxin, toy, toy animal, Toyota, toyshop, trace, trace element, traceable, tracer, tracery, trachea, trachoma, tracing, tracing-paper, track, track and field, track down, track events, track out, track record, track suit, tracked, tracking station, tract, tractability, tractable, traction, traction-engine, tractor, tractor-trailer, trad,