| VD | vapor density; vascular disease; vasodilation, vasodilator; venereal disease; venous dilatation; ven... |
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| VD | dead space |
| Vd | voided, voiding; volume dead space; volume of distribution |
| Vd/Vt | dead space ventilation/total ventilation [ratio] |
| VPS | ventriculoperitoneal shunt; verbal pain scale; virtual point source; visual pleural space; volume pe... |
| space maintainer | <dentistry> A gadget used to maintain a space in your mouth. You would use a space maintainer when you lose one of your baby teeth. The space maintainer will keep a space in your mouth until a permanent tooth comes in to fill the space. (08 Jan 1998) |
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| space medicine | The field of medicine concerned with physiologic diseases or disturbances resulting from the unique conditions of space travel. (05 Mar 2000) |
| space motion sickness | Disorder characterised by nausea, vomiting, and dizziness, possibly in response to vestibular disorientation or fluid shifts associated with space flight. (12 Dec 1998) |
| space nerve | <anatomy, nerve> One of the branches of the vestibulocochlear nerve distributed to the saemicircular canals. (05 Mar 2000) |
| space of Donders | The space between the dorsum of the tongue and the hard palate when the mandible is in rest position following the expiratory cycle of respiration. (05 Mar 2000) |
| space perception | The awareness of the spatial properties of objects; includes physical space. (12 Dec 1998) |
| space retainer | <dentistry> A gadget used to maintain a space in your mouth. You would use a space maintainer when you lose one of your baby teeth. The space maintainer will keep a space in your mouth until a permanent tooth comes in to fill the space. (08 Jan 1998) |
| space sense | The faculty of perceiving the relative positions of objects in the external world. (05 Mar 2000) |
| space sickness | Dizziness as result of changes in inner ear resulting from absence of gravity. Synonym: physiologic vertigo. (05 Mar 2000) |
| space simulation | An environment simulating one or more parameters of the space environment, applied in testing space systems or components. Often, a closed chamber is used, capable of approximating the vacuum and normal environments of space. This also includes simulated extravehicular activity studies in atmosphere exposure chambers or water tanks. (12 Dec 1998) |
| space suits | Pressure suits for wear in space or at very low ambient pressures within the atmosphere, designed to permit the wearer to leave the protection of a pressurised cabin. (12 Dec 1998) |
| space-time clustering | A statistically significant excess of cases of a disease, occurring within a limited space-time continuum. (12 Dec 1998) |
| subarachnoid space | The space between the arachnoidea and pia mater, traversed by delicate fibrous trabeculae and filled with cerebrospinal fluid. Since the pia mater immediately adheres to the surface of the brain and spinal cord, the space is greatly widened wherever the brain surface exhibits a deep depression (for example, between the cerebellum and medulla); such widenings are called cisternae. The large blood vessels supplying the brain and spinal cord lie in the subarachnoid space. Synonym: cavum subarachnoideum, subarachnoid cavity. (05 Mar 2000) |
| subchorial space | The part of the placenta adjacently beneath the chorionic plate; it joins with irregular channels to form the marginal lakes. Synonym: subchorial lake. (05 Mar 2000) |
| subdural space | Originally thought to be a narrow fluid-filled interval between the dural and arachnoid; now known to be an artificial space created by the separation of the arachnoid from the dura as the result of trauma or some ongoing pathologic process; in the healthy state, the arachnoid is attached to the dura and a naturally occurring subdural space is not present. Synonym: spatium subdurale, cavum subdurale, subdural cavity, subdural cleavage, subdural cleft. (05 Mar 2000) |