(Science: instrument) An expensive and usually highly flexible viewing instrument with capabilities of diagnostic (biopsy) or even therapeutic functions through special channels.
For the flexible variety the additional word, fibreoptic is added. The viewing component is made up of hundreds of mini light transmitting glass fibres bundled tightly together. Today there is virtually an endoscope available for every single orifice and space in the body!
Endoscopes have also revolutionalised many procedures - as in laparasocopic surgery, the diagnosis of peptic ulcers, of some lung tumours and those in the urogenital tract.