Definition of "spectroscopical" []

• Alternative form of spectroscopic. (adjective)

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• "It was only natural that precedence was given to the investigations first named, as a fruitful spectroscopical investigation of X-rays presupposed a certain knowledge of the lattice used."
• "It had already become clear that the X-radiation must arise in the inner parts of the atoms, and that consequently exact X-ray spectroscopical investigations form the only means for an experimental research of those parts."
• "This hypothesis has in fact been confirmed, inter alia by spectroscopical investigations into light sources placed in very strong magnetic fields."