optical rotatory power 

https://doi.org/10.1351/goldbook.O04313
Angle of optical rotation divided by the optical path length through the medium and by either the mass concentration of the substance giving the specific optical rotatory power [α]λθ or by amount concentration, giving the molar optical rotatory power, αm.
Source:
Green Book, 2nd ed., p. 33 [Terms] [Book]
Citation: 'optical rotatory power' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.O04313 RIS BibTex EndNote
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Last revised: February 24, 2014