Definition: Spectrophotometrically is a term used in the field of spectroscopy. It refers to the measurement of light intensity or absorbance using specific wavelengths of light, as opposed to other methods such as UV-Vis or IR spectroscopy. Spectrophotometry involves measuring the amount of light that passes through a sample and determines the absorbance (the ratio of the absorbed light to the incident light) at each wavelength. This measurement is crucial for many chemical and biological research applications.