helix angle: the constant angle at which a helix cuts the elements of a cylinder or cone
angle: the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
centipede: chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being modified as prehensors