A Neurologist is a physician who treats nervous system disorders, including diseases of the spinal cord, nerves, and the brain. A Neurologist examines nerves in the head and neck, muscle movement, balance, reflexes, memory and speech.
(nonâ³linâ²Ä-Är) Not linear; not obeying a linear relationship. In mathematics, a linear equation may be given in the form y = mx + b, where x is the independent variable, and y is the dependent variable. A nonlinear relationship cannot be represented by such an equation.
Medical Definition of LENS. 1. : a curved piece of glass or plastic used singly or combined in eyeglasses or an optical instrument (as a microscope) for forming an image by focusing rays of light.2.: a device for directing or focusing radiation other than light (as sound waves, radio microwaves, or electrons).3.. : a curved piece of glass or plastic used singly or combined in eyeglasses or an optical instrument (as a microscope) for forming an image by focusing rays of light. 2.