| RAI | radioactive iodine; radioactive isotope; resident assessment instrument; resting ankle index; right ... |
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| RE | radium emanation; readmission; rectal examination; reference emitter; reflux esophagitis; regional e... |
| REE | rapid extinction effect; rare earth element; resting energy expenditure |
| R-EEG | resting electroencephalography |
| REL | rate of energy loss; recommended exposure limit; resting expiratory level |
low blood pressure
| vegetative stage | The quiescent stage of a cell or its nucleus in which no karyokinetic changes are taking place. Synonym: vegetative stage. (05 Mar 2000) |
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| genital stage | Referring to the psychic organization derived from, and characteristic of, the Freudian genital period of the infant's psychosocial organization. See: genitality. See: anality, orality. (05 Mar 2000) |
| mechanical stage | <microscopy> A device provided for adjusting the position of a specimen, usually by translation in two directions at right angles to each other. (05 Aug 1998) |
| REM stage sleep | <physiology> A stage of deep sleep that is accompanied by rapid eye movement and muscle paralysis. Vivid dreams can be recalled in over 80% of patients who awake from REM stage sleep. (27 Sep 1997) |
| perfect stage | A mycological term used to describe the sexual life cycle phase of a fungus in which spores are formed after nuclear fusion. Synonym: teleomorph. (05 Mar 2000) |
| middle stage HIV disease | <disease> This refers to an HIV infection that is characterised by signs and symptoms of HIV that are not life-threatening. Examples include oral thrush, gingivitis, seborrheic dermatitis, molluscum contangiosum, fevers, fatigue, lymph node swelling, malaise and weight loss. This stage can be a signal for the conversion from asymptomatic HIV disease to HIV disease (moe pronouced symptoms include joint pains). AIDS is diagnosed after HIV disease has started to manifest life-threatening oppotunistic infections (for example pneumocystis, cryptosporidium, toxoplasmosis, etc). (27 Sep 1997) |
| cleavage stage, ovum | The embryo in its earliest stage, lasting from the first mitotic division of the fertilised ovum into two blastomeres to the formation of the morula, a compact mass of blastomeres. (12 Dec 1998) |
| cold stage | The stage of chill in a malarial paroxysm. (05 Mar 2000) |
| placental stage of labour | The part of labour from the birth of the baby until the placenta (afterbirth) and foetal membranes are delivered. Also called the third stage of labour. (12 Dec 1998) |
| preconceptual stage | In psychology, the stage of development in an infant's life, prior to actual conceptual thinking, in which sensorimotor activity predominates. (05 Mar 2000) |
| prodromal stage | incubation period |
| second stage of labour | <obstetrics> The part of labour from the full dilatation of the cervix until the baby is completely out of the birth canal. The second stage of labour is also called the stage of expulsion. (12 Dec 1998) |
| specimen stage | <microscopy> The part of the microscope which supports the specimen holder and specimen in the microscope, and can be moved in a plane perpendicular to the optical axis from outside the column. (05 Aug 1998) |
| stage | <oncology> The extent to which cancer has spread from its original site to other parts of the body. Usually denoted by a number from Stage 1 (least severe) to Stage 4 (more advanced). Different lymphoma types have different criteria for staging. (12 May 1997) |
| stage mechanical | <microscopy> A small fixture, either built into the light microscope stage or attached separately, it holds the specimen slide and has two horizontal screw adjustments at right angles to each other. The screw motions permit the specimen to be moved as desired. The quantitative type has vermer scales for reading the amount of displacement to 0.1 mm. This stage is sometimes called the traversing stage. (05 Aug 1998) |