| LD | labor and delivery; laboratory data; labyrinthine defect; lactate dehydrogenase; laser Doppler; lear... |
|---|---|
| MAD | major affective disorder; mandibulo-acral dysplasia; maximum allowable dose; methylandrostenediol; m... |
| MAFD | manic affective disorder |
| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
| MDD | major depressive disorder; mean daily dose |
| Schlieren system | <microscopy> A system for enhancing path length differences, refractive index differences in transparent media, or height differences for light reflected from surfaces. (05 Aug 1998) |
|---|---|
| heterogeneous system | In chemistry, a system that contains various distinct and mechanically separable parts or phases; e.g., a suspension or an emulsion. (05 Mar 2000) |
| hexaxial reference system | The figure resulting if the lines of derivation of the unipolar limb leads of the electrocardiogram are added to the triaxial reference system. (05 Mar 2000) |
| His-Tawara system | The complex system of interlacing Purkinje fibres within the ventricular myocardium. See: conducting system of heart. (05 Mar 2000) |
| second signaling system | <psychology> Pavlovian term for speech in which words are considered to be the second signals capable of producing conditioned responses. (05 Mar 2000) |
| pulmonary branch of autonomic nervous system | Pulmonary branches of cardiac plexuses and cardiaopulmonary splanchnic nerves. Synonym: rami pulmonales systematis autonomici. (05 Mar 2000) |
| homogeneous system | In chemistry, a system whose parts cannot be mechanically separated, and is therefore uniform throughout and possesses in every part identically physical properties; e.g., a solution of sodium chloride in water. (05 Mar 2000) |
| Purkinje system | <cardiology, physiology> Terminal ramifications in the ventricles of the specialised conducting system of the heart. (05 Mar 2000) |
| sensory system agents | Drugs that act on neuronal sensory receptors resulting in an increase, decrease, or modification of afferent nerve activity. (12 Dec 1998) |
| host-vector system | A combination of a bacterial host cell (i.e. A specific strain) and a virus vector (i.e. A particular bacteriophage strain) which work well together for DNA cloning. (09 Oct 1997) |
| serotonergic system | <anatomy, physiology> The system of nerve cells that uses serotonin as their neurotransmitter. (22 May 1998) |
| single-payer system | An approach to health care financing with only one source of money for paying health care providers. The scope may be national (the canadian system), state-wide, or community-based. The payer may be a governmental unit or other entity such as an insurance company. The proposed advantages include administrative simplicity for patients and providers, and resulting significant savings in overhead costs. (12 Dec 1998) |
| skeletal system | The bones and cartilages of the body. Synonym: systema skeletale. (05 Mar 2000) |
| hypophyseoportal system | A capillary network that carries hypophyseotropic hormones from the hypothalamus, where they are secreted into blood, to their sites of action in the anterior hypophysis. See: portal circulation, hypophysis, hypothalamus. Synonym: hypophyseoportal system, hypophysial portal circulation, hypophysial portal system, hypophysioportal system, hypothalamohypophysial portal circulation, hypothalamohypophysial portal system. (05 Mar 2000) |
| hypophysial portal system | A capillary network that carries hypophyseotropic hormones from the hypothalamus, where they are secreted into blood, to their sites of action in the anterior hypophysis. See: portal circulation, hypophysis, hypothalamus. Synonym: hypophyseoportal system, hypophysial portal circulation, hypophysial portal system, hypophysioportal system, hypothalamohypophysial portal circulation, hypothalamohypophysial portal system. (05 Mar 2000) |