All articles starting with M

Multidisciplinary design optimization

Multidisciplinary design optimization (MDO) is a computational engineering method that optimizes a complex system's design by coupling several disciplines, such as aerodynamics and structures, in one problem.

Multidrug efflux pump subunit AcrA

AcrA (UniProt P0AE07) is the 42.2 kDa periplasmic adaptor protein of the E. coli AcrAB-TolC RND multidrug efflux pump, bridging AcrB and TolC in a 3:6:3 assembly that drives intrinsic antibiotic resistance.

Multidrug resistance protein MdtH

Multidrug resistance protein MdtH (gene mdtH, also yceL) is a 402-amino-acid major facilitator superfamily efflux transporter of Escherichia coli K-12 that confers resistance to norfloxacin and enoxacin and exports the anthocyanin C3G.

Multidrug resistance protein MexA

MexA (UniProt P52477) is the periplasmic adaptor protein of the MexAB-OprM RND multidrug efflux pump of Pseudomonas aeruginosa, with MP, beta-barrel, lipoyl, and alpha-hairpin domains, forming a hexameric ring that bridges MexB and OprM.

Sep 19, 2026

Multiexport Foods

Multiexport Foods is a Chilean salmon farming and exporting holding company founded in 1983, whose operating subsidiary Multi X leads Chile's smoked-salmon exports and ranks second in Atlantic salmon.

Multifactor dimensionality reduction

Multifactor dimensionality reduction (MDR) is a nonparametric, model-free data-mining method that detects gene-gene and gene-environment interactions in case-control genetic studies, introduced by Ritchie and colleagues in 2001.

Multifactorial Inheritance

Multifactorial inheritance, also called polygenic or complex inheritance, is trait inheritance involving multiple genes plus environmental factors; it underlies height, neural tube defects, diabetes, and hypertension without Mendelian patterns.

Multiferroic nanocomposite

A multiferroic nanocomposite is a nanostructured material combining a ferroelectric phase such as BiFeO₃ with a magnetic spinel like CoFe₂O₄, achieving magnetoelectric coupling for sensors, memory, and energy harvesting.

Multiferroic tunnel junction

A magnetoelectric multiferroic tunnel junction (MFTJ) is a nanoscale device in which a ferroelectric barrier sits between two ferromagnetic electrodes, giving four distinct resistance states.

Multiferroics

Multiferroics are materials that combine ferroelectricity and magnetism in one phase, whose magnetoelectric coupling enables low-power memory and logic controlled by electric fields rather than currents.

Multifetal pregnancy reduction

Multifetal pregnancy reduction (MFPR) is a first-trimester procedure that terminates one or more fetuses in a multifetal pregnancy to improve survival of the remaining fetuses.

Sep 17, 2026

Multifocal atrial tachycardia

Multifocal atrial tachycardia (MAT), also called chaotic atrial tachycardia, is an irregular arrhythmia with at least three P-wave morphologies at rates over 100 bpm, seen mostly in elderly COPD patients and treated first by correcting underlying causes.

Multifocal cerebral infarctions

Multifocal cerebral infarctions (ICD-11 8E64, postprocedural) are multiple ischemic brain infarcts in several arterial territories; 13% of strokes, usually cardioembolic, common after cardiac surgery, with vasculitis a key differential.

Multifocal ectopic Purkinje-related premature contraction

MEPPC (multifocal ectopic Purkinje-related premature contraction), also called multifocal ectopic premature Purkinje-related complexes, is a rare autosomal dominant SCN5A gain-of-function arrhythmia syndrome with high-burden narrow-QRS Purkinje PVCs, dilated cardiomyopathy, and sudden death risk; treated with flecainide or quinidine.

Multifocal electroretinography

Multifocal electroretinography (mfERG) is an electrophysiological technique that records electrical responses from many retinal regions at once, mapping cone function to detect maculopathies and hydroxychloroquine toxicity.

Multifocal infantile hemangioma with extracutenous involvement

Multifocal infantile hemangioma with extracutenous involvement, once called diffuse neonatal hemangiomatosis, is a rare disorder marked by numerous skin hemangiomas plus hemangiomas of internal organs such as the liver.

Multifocal Intraocular Lenses

Multifocal intraocular lenses (MIOLs), including bifocal, trifocal, refractive, and diffractive designs, are implanted IOLs giving near, intermediate, and distance vision after cataract surgery, trading reduced contrast sensitivity and halos for spectacle independence.

Multifocal lymphangioendotheliomatosis-thrombocytopenia syndrome

Multifocal lymphangioendotheliomatosis-thrombocytopenia syndrome (MLT), also called cutaneovisceral angiomatosis-thrombocytopenia syndrome, is a rare lymphatic disorder first described in 2004, with congenital skin and gastrointestinal vascular lesions that deplete platelets and bleed.

Oct 20, 2026

Multifocal motor neuropathy

Multifocal motor neuropathy (MMN), also called MMNCB, is a rare immune-mediated purely motor neuropathy with asymmetric distal upper-limb weakness, motor conduction block, anti-GM1 IgM antibodies in 40-50%, and IVIg as first-line therapy.

Multifocal pattern dystrophy simulating fundus flavimaculatus

Multifocal pattern dystrophy simulating fundus flavimaculatus (MPDSFF), also called pseudo-Stargardt pattern dystrophy, is a rare autosomal dominant PRPH2-related retinal pigment epithelium dystrophy with adult-onset yellow flecks, hyperautofluorescence, no dark choroid, and a better prognosis than Stargardt disease.

Multifold fermion

A multifold fermion is a crystal quasiparticle where three or more electronic bands cross at a degeneracy enforced by symmetry, seen in materials like CoSi.

Multifractal detrended fluctuation analysis

Multifractal detrended fluctuation analysis (MF-DFA) is a statistical method that measures multifractality in nonstationary time series, reported by Jan W. Kantelhardt and colleagues in 2002.

Sep 17, 2026

Multifunctional Reconnaissance Company

Multifunctional Reconnaissance Company (MFRC), a US Army brigade-level reconnaissance company of the Mobile Brigade Combat Team, first rolled out in the 2nd MBCT, 101st Airborne Division, combining infantry scouts, robotics, electronic warfare, and small UAS after cavalry squadrons were inactivated.