isosbestic point(redirected from isosbestic points)
Also found in: Medical.
isosbestic point[‚ī·səs‚bes·tik ′point]
During a chemical reaction, a point in the absorption spectrum (that is, a wavelength) where at least two chemical species (for example, reactant and product) have identical molar absorption coefficients, which remain constant as the reaction proceeds. A stable isosbestic point is evidence that a reaction is proceeding without forming an intermediate or multiple products.