| anxiety, separation | Anxiety experienced by an individual upon separation from a person or object of particular significance to him. (12 Dec 1998) |
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| phase separation | <chemistry> The separation of fluid phases that contain different concentrations of common components. Occurs with partially miscible solvents used in many biochemical separation methods. Also temperature dependent phase separation occurs with some detergent solutions. With reference to membranes means the segregation of lipid components into domains that have different chemical composition. (31 Dec 1997) |
| separation | The act of separating, or the state of being separated, or separate. Specifically: Chemical analysis. Divorce. The operation of removing water from steam. Judicial separation, a form of divorce; a separation of man and wife which has the effect of making each a single person for all legal purposes but without ability to contract a new marriage. Origin: L. Separatio: cf. F. Separation. Source: Websters Dictionary (01 Mar 1998) |
| separation anxiety | A child's apprehension or fear associated with removal from or loss of a parent or significant other. (05 Mar 2000) |
| separation anxiety disorder | A mental disorder occurring in childhood characterised by excessive anxiety when the child is separated from someone to whom the child is attached, usually a parent. (05 Mar 2000) |
| separation of retina | <ophthalmology> A painless disorder (when spontaneous) where the patient complains of a gradual raising or lowering of a curtain over the visual field of the affected eye. May also occur as the result of trauma. (27 Sep 1997) |
| separation of teeth | Loss of proximal contact of teeth, in orthodontics, the creation of interproximal spaces for the fitting of an appliance. (05 Mar 2000) |
| sternochondral separation | Separation of the sternochondral articulation, especially of the 2nd to 7th ribs, which are true joints lined with synovial membranes. (05 Mar 2000) |
| immunomagnetic separation | A cell-separation technique where magnetizable microspheres or beads are first coated with monoclonal antibody, allowed to search and bind to target cells, and are then selectively removed when passed through a magnetic field. Among other applications, the technique is commonly used to remove tumour cells from the marrow of patients who are to undergo autologous bone marrow transplantation. (12 Dec 1998) |
| aging, premature | Changes in the organism associated with senescence, occurring at an accelerated rate. (12 Dec 1998) |
| atrial premature complexes | Premature contractions of the heart arising from an ectopic atrial focus. With ventricular premature complexes, they represent one of the most common causes of irregular pulse. They are more apt to occur if there is atrial or conduction system disease such as left atrial enlargement in mitral stenosis. In community prospective studies, atrial premature complexes are not related to sudden death, as are ventricular premature beats in coronary disease. (12 Dec 1998) |
| atrial premature contraction | <cardiology> An premature heartbeat of atrial origin. Generally nonserious and typically exacerbated by stimulant use (for example alcohol, decongestants, caffeine, nicotine). (27 Sep 1997) |
| cardiac complexes, premature | Premature contractions of the heart that are independent of the normal rhythm and arise in response to an impulse in some part of the heart other than the sinoatrial node. (12 Dec 1998) |
| ventricular premature complexes | Premature contractions of the ventricle, the most common of all arrhythmias. In the absence of heart disease, they are not of great clinical significance, but in patients with coronary disease, they represent a constant danger of ventricular tachycardia or fibrillation and sudden death. The longer-term prognosis for asymptomatic, healthy subjects with frequent and complex ectopy is similar to that for the healthy united states population. (12 Dec 1998) |
| retinopapillitis of premature infants | <ophthalmology, paediatrics> A bilateral retinopathy occurring in premature infants treated with excessively high concentrations of oxygen, characterised by vascular dilatation, proliferation, and tortuosity, oedema, and retinal detachment, with ultimate conversion of the retina into a fibrous mass that can be seen as a dense retrolental membrane. Usually growth of the eye is arrested and may result in microophthalmia, and blindness may occur. (03 Jul 1999) |