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]