Category: R

A groove round the uterus, separating its upper and lower parts, which, in obstructed labour, prevents the baby from moving forward as expected into the cervical canal. A depression on the surface of the womb that may be detected during labor by applying the hand to the lower part of the abdomen. It occurs in…

To stop work at a particular age. To discontinue formal employment or work at a specific place or task. In the past, in many industries, educational institutions, and public service, retirement was mandated when an employee had attained a specified age. This practice has lost its attractiveness to a large segment of the workforce, especially…

A method of measuring refractive errors in the eye using a retinoscope. An objective method of determining refractive errors of the eye. The examiner projects light into the eyes and judges error of refraction by the movement of reflected light rays. Retinoscopy is a vision examination method wherein a retinoscope emits a light beam into…

An instrument with various lenses, used to measure the refraction of the eye. An instrument used to determine the power of ‘refraction of the eye. It is held in the hand and casts a beam of light into the subject’s eye. The examiner looks along the beam and sees the shadows it produces in the…

The only artery of the retina, which accompanies the optic nerve.  

Any of several conditions where cells in the reticuloendothelial system grow large and form usually malignant tumours. Abnormal overgrowth, usually malignant, of any of the cells of the lymphatic glands or the immune system.  

A condition in which cells in the RES grow large and form swellings in bone marrow or destroy bones. Overgrowth of cells of the reticuloendothelial system, causing either isolated swelling of the bone marrow (eosinophilic granuloma) or destruction of the bones of the skull (Hand-Schuller-Christian disease). The most acute form, starting in infancy and usually…

A series of phagocytic cells in the body, found especially in bone marrow, lymph nodes, liver and spleen, which attack and destroy bacteria and form antibodies. Unit of the body made up of phagocytic cells (e.g., Kupffer cells of the liver, macrophages, and cells of the spleen and bone marrow) and functioning in immune responses…

A phagocytic cell in the reticuloendolethial system. An out-of-date term for a cell of the mononuclear phagocytic system.  

A condition in which the number of reticulocytes in the blood increases unusually. An increase in the proportion of immature red blood cells (reticulocytes) in the bloodstream: a sign of increased output of new red cells from the bone marrow. An increased number of reticulocytes in the circulating blood. This condition indicates active erythropoiesis in…