'laevorotation' definitions:

Definition of 'laevorotation'

From: GCIDE

Levorotation \Le`vo*ro*ta"tion\, n. [Written also l[ae]vorotation.] [Levo- + rotation.] (Physics & Chem.) Rotation in the direction of an outgoing right-handed screw; counter-clockwise rotation; -- applied chiefly to the turning of the plane of polarization of light. [Webster 1913 Suppl.]