D defs.my
Entry 1 sense Webster, 1913

Levorotation

· Le·vo·ro·ta·tion · IPA
01 n. Rotation in the direction of an outgoing right-handed screw; counter-clockwise rotation; -- applied chiefly to the turning of the plane of …
  1. 1.
    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.(Physics & Chem.)