| MMA | mastitis-metritis-agalactia [syndrome]; medical management analysis; medical materials account; meth... |
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| MND | minimum necrosing dose; minor neurological dysfunction; modified neck dissection; motor neuron disea... |
| MPA | mean pulmonary arterial [pressure]; medial preoptic area; Medical Procurement Agency; medroxyprogest... |
| MPM | malignant papillary mesothelioma; medial pterygoid muscle; minor psychiatric morbidity; multiple pri... |
| MSS | Marshall-Smith syndrome; massage; Medical Superintendents' Society; Medicare Statistical System; men... |
| MSG | Minor salivary glands |
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| MCR | minor cluster region |
| MDM | minor determinant mixture |
| mHA | minor histocompatibility antigen |
| minor hippocampus | The lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain, caused by the depth of the calcarine sulcus. Synonym: Haller's unguis, hippocampus minor, minor hippocampus, Morand's spur, unguis avis. (05 Mar 2000) |
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| minor histocompatibility antigens | Allelic alloantigens often responsible for weak graft rejection in cases when (major) histocompatibility has been established by standard tests. In the mouse they are coded by more than 500 genes at up to 30 minor histocompatibility loci. The most well-known minor histocompatibility antigen in mammals is the h-y antigen. (12 Dec 1998) |
| minor histocompatibility loci | Genetic loci responsible for the encoding of histocompatibility antigens other than those encoded by the major histocompatibility complex. The antigens encoded by these genes are often responsible for graft rejection in cases where histocompatibility has been established by standard tests. The location of some of these loci on the x and y chromosomes explains why grafts from males to females may be rejected while grafts from females to males are accepted. In the mouse roughly 30 minor histocompatibility loci have been recognised, comprising more than 500 genes. (12 Dec 1998) |
| minor hypnosis | An induced state resembling normal sleep in which the subject is susceptible to suggestion, though not to the extent of catalepsy or somnambulism. (05 Mar 2000) |
| minor hysteria | A mild form of hysteria characterised chiefly by subjective pains, nervousness, undue sensitiveness, and sometimes episodes of emotional excitement, but without paralysis or other such symptoms. (05 Mar 2000) |
| minor lymphocyte stimulatory antigens | Endogenous superantigens responsible for inducing strong proliferative responses in T-cells in mixed lymphocyte reactions (see mixed lymphocyte culture test). They are encoded by mouse mammary tumour viruses that have integrated into the germ line as DNA proviruses (minor lymphocyte stimulatory loci). (12 Dec 1998) |
| minor lymphocyte stimulatory loci | Genetic loci responsible for the encoding of minor lymphocyte stimulatory antigens. There are at least two unlinked loci (in the mouse) and they appear to be separate from the major histocompatibility complex and minor histocompatibility loci. The mouse mammary tumour virus (see mammary tumour viruses, mouse) has the ability to integrate into these loci. The antigens induce strong T-cell proliferative responses in mixed lymphocyte reactions. (12 Dec 1998) |
| minor motor seizure | Old term for nonconvulsive seizure seen in patients with secondary generalised epilepsies. (05 Mar 2000) |
| minor operation | A surgical procedure of relatively slight extent and not in itself hazardous to life. (05 Mar 2000) |
| minor planets | Small solar system planetary bodies including asteroids. most asteroids are found within the gap lying between the orbits of mars and jupiter. (12 Dec 1998) |
| minor salivary gland | A small gland which produces saliva. There are numerous minor salivary glands distributed within the mouth and palate. (12 Dec 1998) |
| minor salivary glands | The smaller, largely mucous-secreting, exocrine gland's of the oral cavity, consisting of the labial, buccal, molar, lingual, and palatine gland's. (05 Mar 2000) |
| minor sublingual ducts | From 8 to 20 small ducts of the sublingual salivary gland that open into the mouth on the surface of the sublingual fold; a few join the submandibular ducts. Synonym: ductus sublinguales minores, Rivinus' ducts, Walther's canals, Walther's ducts. (05 Mar 2000) |
| minor surgery | See: minor operation. (05 Mar 2000) |
| minor tranquilliser | A functional category of drugs useful in the treatment of anxiety and able to reduce anxiety at doses which do not cause excessive sedation (e.g., diazepam). Synonym: anxiolytic, minor tranquilliser. (05 Mar 2000) |