Medications

MDI: 1. Metered-dose inhaler; 2. Multiple daily injections; 3. Mental developmental index, as in "the Bayley Mental Developmental Index (MDI), which measures language, memory, and problem-solving abilities." Last Editorial Review: ...

MDCT - Medical

MDCT: Multidetector computed tomography. Last Editorial Review: 11/17/2004 Multidetector computed tomography: (MDCT) A form of computed tomography (CT) technology for diagnostic imaging. In MDCT, a two-dimensional array of detector elements re...

MD - Medical

MD: Abbreviation for the Latin Medicinae Doctor, Doctor of Medicine. Last Editorial Review: 4/27/2011 5:27:15 PM...

MCV - Medical

MCV: Abbreviation for mean cell volume, the average volume of a red blood cell. This is a calculated value derived from the hematocrit and the red cell count (The hematocrit is the ratio of the volume of red cells to the volume of whole blood while t...

MCTD - Medical

MCTD: Abbreviation standing for Mixed Connective Tissue Disease, an overlapping mixture of three diseases of connective tissue disease (the framework of the cells of the body) -- systemic lupus erythematosus, scleroderma, and polymyositis. ...

MCPH1 - Medical

MCPH1: Microcephalin 1.Last Editorial Review: 7/26/2004 Microcephalin 1: Mutation of this gene is responsible for an autosomal recessive form of primary microcephaly with no other malformations. Microcephalin 1 (MCPH1) is expressed in fetal brain in...

MCP1 - Medical

MCP1: Monocyte chemotactic protein-1, a member of the small inducible gene (SIG) family, plays a role in the recruitment of monocytes to sites of injury and infection. The gene for MCP1 is on chromosome 17 in region 17q11.2-q12. MPC1 has been found...

MCP - Medical

MCP: Membrane cofactor protein. A ubiquitous protein on the surface of cells that regulates complement and is involved in the attachment and ingestion of foreign particles by neutrophils and macrophages. The gene for MCP is on chromosome 1q32. Las...

MCL (medial collateral ligament) of the knee - Medical

MCL (medial collateral ligament) of the knee: The knee joint is surrounded by a joint capsule with ligaments strapping the inside and outside of the joint (collateral ligaments) as well as crossing within the joint (cruciate ligaments). These ligam...

McKusick-Kaufman syndrome - Medical

McKusick-Kaufman syndrome: A genetic disorder in which there is build-up of fluids (called hydrometrocolpos) in the vagina and the uterus as a result of a membrane across the vagina which holds back the cervical fluid secreted in response to the moth...

MCI - Medical

MCI: Mild cognitive impairment.Last Editorial Review: 7/19/2004 Mild cognitive impairment: Abbreviated MCI. A brain disorder in which thinking abilities are mildly impaired. Individuals with mild cognitive impairment are able to function in everyday...

MCHC - Medical

MCHC: Abbreviation for mean cell hemoglobin concentration, which is the average concentration of hemoglobin in a given volume of blood. The MCHC is a calculated value derived from the measurement of hemoglobin and the hematocrit. (The hemoglobin val...

MCH - Medical

MCH: Abbreviation for mean cell hemoglobin, which is the average amount of hemoglobin in the average red cell. The MCH is a calculated value derived from the measurement of hemoglobin and the red cell count. (The hemoglobin value is the amount of he...

MCD - Medical

MCD: Abbreviation (not only for McDonald's but also) for a number of entities in medicine including minimal change disease, mean corpuscular diameter, and medullary cystic disease.Last Editorial Review: 8/24/2003 Minimal change disease: The most com...

McCune-Albright syndrome - Medical

McCune-Albright syndrome: A genetic disorder of bones, skin pigmentation and hormonal problems with premature sexual development. Also called Albright syndrome or polyostotic fibrous dysplasia. In the syndrome, there is bone disease with fractures a...

McClintock, Barbara - Medical

McClintock, Barbara: (1902-1992) American geneticist who won the 1983 Nobel Prize in Physiology or Medicine for her discovery of genetic transposition, or the ability of genes to change position on the chromosome. Barbara McClintock was born in Hart...

McClintock - Medical

McClintock: See: McClintock, BarbaraLast Editorial Review: 10/19/2003 McClintock, Barbara: (1902-1992) American geneticist who won the 1983 Nobel Prize in Physiology or Medicine for her discovery of genetic transposition, or the ability of genes to ...

McBurney's point - Medical

McBurney's point: McBurney's point is the most tender area of the abdomen of patients in the early stage of appendicitis. McBurney's point is named after the 19th-century New York surgeon Charles McBurney (1845-1913) who was the leading authority...

MCAT - Medical

MCAT: The Medical College Admissions Test, a test that is required of all applicants to medical school in the U.S. and Canada. The MCAT is "a standardized test used to assess applicants' science knowledge, reasoning, and communication and writing ski...

McArdle's disease - Medical

McArdle's disease: See: McArdle disease.Last Editorial Review: 12/28/2003 McArdle disease: Glycogen storage disease type V and the most common type of glycogen storage disease. McArdle disease is an autosomal recessive disorder caused by mutations i...

McArdle disease - Medical

McArdle disease: Glycogen storage disease type V and the most common type of glycogen storage disease. McArdle disease is an autosomal recessive disorder caused by mutations in the gene that encodes myophosphorylase, an enzyme that is essential for g...

MCAF - Medical

MCAF:Monocyte chemotactic and activating factor. See: MPC1. Last Editorial Review: 6/30/2004 MCP1: Monocyte chemotactic protein-1, a member of the small inducible gene (SIG) family, plays a role in the recruitment of monocytes to sites of injury ...

MCAD deficiency - Medical

MCAD deficiency: Deficiency of an enzyme that makes it impossible to digest certain kinds of fat. MCAD stands for medium-chain acyl-CoA dehydrogenase. Children born with MCAD deficiency cannot metabolize (digest) medium-chain fats such as coconut o...

MCAD - Medical

MCAD: Abbreviation for medium-chain acyl-CoA dehydrogenase. See: MCAD deficiency. Last Editorial Review: 11/19/2003 MCAD deficiency: Deficiency of an enzyme that makes it impossible to digest certain kinds of fat. MCAD stands for medium-chain a...

MBChB - Medical

MBChB: Bachelor of Medicine and Bachelor of Surgery degrees, which are awarded in the U.K. and other countries (such as New Zealand and South Africa) after 5 years of what is analogous to a combined undergraduate-graduate course of study. As a rule, ...

MB ChB - Medical

MB ChB: Bachelor of Medicine and Bachelor of Surgery degrees. See: MBChB.Last Editorial Review: 6/20/2004 MBChB: Bachelor of Medicine and Bachelor of Surgery degrees, which are awarded in the U.K. and other countries (such as New Zealand and South A...

Mb - Medical

Mb: Megabase.Last Editorial Review: 11/29/2003 Megabase: Unit of length for DNA fragments that is equal to 1 million nucleotides. A megabase (Mb) is roughly equal to 1 centiMorgan (cM). Last Editorial Review: 11/29/2003...

Maxilla - Medical

Maxilla: The maxilla is the major bone of the upper jaw Last Editorial Review: 4/27/2011 5:27:15 PM...

Maturity onset diabetes of the young - Medical

Maturity onset diabetes of the young: Diabetes mellitus that has early onset (usually before the age of 25), is non-insulin-dependent, and is inherited in an autosomal dominant manner. Abbreviated MODY. MODY is often considered a subtype of type 2 ...

Matter, white - Medical

Matter, white: The part of the brain that contains myelinated nerve fibers. The white matter is white because it is the color of myelin, the insulation covering the nerve fibers. The white matter is as opposed to the gray matter (the cortex of the...