Category: R

  • Reflux

    The term used when liquid backs up into the esophagus from the stomach. A situation where a fluid flows in the opposite direction to its usual flow. Abnormal backflow, as sometimes occurs with fluids in the esophagus (gastro-esophageal reflux) or other body parts. A backflow of liquid, against its normal direction of movement. Fluid flowing…

  • Refer

    To send or direct for treatment, aid, information, de decision. To mention or to talk about something. To suggest that someone should consult something. To pass on information about a patient to someone else. To send someone to another doctor, usually a specialist, for advice or treatment.  

  • Reductase

    Enzyme converting testosterone to dihydrotestosterone. An enzyme that accelerates the reduction process of chemical compounds.  

  • Red blood cells

    Cells that carry oxygen to all parts of the body. Also called erythrocytes. Erythrocyte; blood cells responsible for oxygen transport. The cells that transport oxygen contain hemoglobin. Most of the hematocrits. A blood cell which contains haemoglobin and carries oxygen to the tissues and takes carbon dioxide from them. Blood cell that helps bring oxygen…

  • Rectum

    The last 8 to 10 inches of the large intestine. The lower part of the large intestine terminating at the anus. The end part of the large intestine leading from the sigmoid colon to the anus. Last portion of the large intestine, about 5 inches (12-13 centimeters) long, connecting the sigmoid colon and the anus.…

  • Recombination

    The formation of new combinations of genes as a result of segregation in crosses between genetically different parents; also the rearrangement of linked genes due to crossing-over. The joining of genes, sets of genes, or parts of genes, into new combinations, either biologically or through laboratory manipulation (e.g., genetic engineering). The formation of new gene…

  • Recombinant

    A cell or an individual with a new combination of genes not found together in either parent; usually applied to linked genes. In genetics and molecular biology, pert, to genetic material combined from different sources. Segments of DNA from one organism artificially manipulated or inserted into the DNA of another organism, using a technique known…

  • Reagent

    A substance employed to produce a chemical reaction so as to detect, measure, produce, etc., other substances. A chemical substance which reacts with another substance, especially one which is used to detect the presence of the second substance. A substance used to produce a chemical reaction to detect, measure, or produce other substances. For example,…

  • Reactivation

    The restoration of activity to something that has been inactivated. The process of making something active again. Reactivating a dormant serum by adding complement.  

  • Randomized clinical trial

    A study in which the participants are assigned by chance to separate groups that compare different treatments; neither the researchers nor the participants can choose which group. Using chance to assign people to groups means that the groups will be similar and that the treatments they receive can be compared objectively. At the time of…