(tôrk) noun
1. Mech. a Anything that causes or tends to cause torsion in a body; the moment of forces that causes rotation or twisting. b The rotary force in a mechanism. c The degree of smoothness in the conversion of reciprocating into rotary motion.
2. Optics The rotatory effect upon the plane of polarization produced by the passage of light through certain liquids and crystals. [<L torquere twist]

(tôrk) noun
A necklace, armlet, or collar of wire, usually twisted: worn especially by ancient Gauls and Britons: also spelled torc. [<L torques. See TORQUES.]