Neurology. Slight or incomplete paralysis. Origin: Gr. = relaxation This entry appears with permission from the Dictionary of Cell and Molecular Biology. Paresis is a condition typified by a weakness of voluntary movement, or partial loss of voluntary movement or by impaired movement. When used without qualifiers, it usually refers to the limbs, but it can also be used to describe the muscles of the eyes (ophthalmoparesis), the stomach (gastroparesis), and also the vocal cords (Vocal cord paresis). Neurologists use the term paresis to describe weakness, andplegia to describe paralysis in which all voluntary movement is lost. The term paresiscomes from the πάρεσις "letting go" or "paralysis" from παρίημι "to let go, to let fall.". (An OSH glossary used in safety and health at work which is, adopted by ILO {102}.. The term definition has been obtained from the secondary source