1) Counterclockwise rotation 2) Gyration 3) Revolution 4) Rotation 5) Rotation to the left 
• (n.) 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.
1. A turning or twisting to the left; in particular, the counterclockwise twist given the plane of plane-polarised light by solutions of certain optically active substances. ... Compare: dextrorotation. ... Synonym: sinistrotorsion. ... Origin: Levo-+ L. Roto, to turn ... (05 Mar 2000) ... 
(le″vo-ro-ta´shәn) a turning to the left.
Le`vo·ro·ta'tion noun [ Written also lævorotation .] [ 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. 
Type: Term Pronunciation: lē′vō-rō-tā′shŭn Definitions: 1. A turning or twisting to the left; in particular, the counterclockwise twist given the plane of plane-polarized light by solutions of certain optically active substances. Synonyms: sinistrotorsion
[n] - rotation to the left
counterclockwise rotation noun rotation to the left