All articles starting with M

Mengzi

Mengzi (蒙自市) is the county-level seat of Honghe Prefecture, southeastern Yunnan, China; 2,228 km², about 601,300 people, birthplace of crossing-the-bridge rice noodles, a Kunming–Hanoi corridor node, 2025 GDP 509.71 billion yuan.

Menhera (メンヘラ)

Menhera (メンヘラ) is Japanese internet slang from "mental health" + "-er", coined on 2channel's mental health board in August 2000; now a derogatory label for unstable people, a character archetype, and a yami-kawaii fashion subculture.

Sep 19, 2026

Menhet, Menwi and Merti

Menhet, Menwi and Merti were three foreign-born wives of pharaoh Thutmose III, buried together in a richly furnished rock-cut tomb at Thebes, found and robbed in 1916.

Menhir

Menhir (Breton men + hir, "long stone"): a single prehistoric standing stone set upright alone or in rows, dating from the sixth millennium BCE in Iberia; purposes debated, from boundary markers to memorials.

Menhit (crater on Ganymede)

Menhit is a 140 km diameter crater on Jupiter's moon Ganymede at 36.31°S, 140.32°W, named by the IAU in 2006 for the Egyptian lion and war goddess; it is cited as a moat crater with subdued rims and a central dome.

Sep 21, 2026

Meni Wanunu

Meni Wanunu is a physicist and bioengineer at Northeastern University who directs the Nanoscale Biophysics Laboratory and develops solid-state nanopore sensors for single-molecule DNA, RNA, and protein analysis.

Menidia menidia

Menidia menidia, the Atlantic silverside (capucette), is a small annual atherinopsid fish of western Atlantic estuaries from the Gulf of St. Lawrence to Florida, known for countergradient latitudinal growth adaptation and an exceptionally diverse genome.

Ménière's disease

Ménière's disease, an inner ear disorder with episodic vertigo, fluctuating hearing loss, tinnitus, and aural fullness, linked to endolymphatic hydrops; cause unknown, treated with diet, drugs, injections, or surgery.

Menihek Lakes

Menihek Lakes (Innu: Minaiku) is a lake system in western Labrador on the upper Churchill River, site of the 18 MW Menihek hydroelectric station built in 1954 to power the Schefferville iron ore mines.

Sep 24, 2026

Menilek II's circular letter to the European powers (1891)

Menilek II's circular letter to the European powers was an April 1891 dispatch in which Emperor Menilek II of Ethiopia set out his empire's boundaries and rejected the colonial partition of Africa.

Menin

Menin, the 610 amino acid protein encoded by the MEN1 gene at 11q13, is a nuclear tumor-suppressor scaffold in MLL1/2 H3K4 methyltransferase complexes; its loss causes MEN1 syndrome and its inhibition treats KMT2A-rearranged AML.

Menin Gate

Menin Gate (Menenpoort), Ypres (Ieper), Belgium: Commonwealth War Graves Commission memorial to the Missing designed by Sir Reginald Blomfield, unveiled 24 July 1927, bearing nearly 55,000 names, with the nightly Last Post since 1929.

Meningeal lymphatic vessels

Meningeal lymphatic vessels (MLVs), dural lymphatics rediscovered in 2015 by Louveau and Aspelund, drain CSF, interstitial fluid, waste, and immune cells to deep cervical lymph nodes; dysfunction links to Alzheimer's, Parkinson's, stroke, and aging.

Meninges

Meninges: the dura mater, arachnoid mater, and pia mater, the three membranes covering the brain and spinal cord, with their spaces, CSF, blood supply, and related conditions like meningitis and hematomas.

Meningioma

Meningioma, the most common primary brain tumor (37.6% of adult intracranial tumors), a slow-growing tumor of the meninges graded WHO 1-3, with TERT/CDKN2A/B molecular grading and treatment by observation, surgery, or radiosurgery.

Meningism

Meningism, also called meningismus, is the syndrome of headache, neck stiffness, and photophobia suggesting meningeal irritation when the meninges are not actually inflamed, so it requires evaluation to find the cause.

Meningitis

Meningitis is inflammation of the meninges, the lining of the brain and spinal cord, caused by bacteria, viruses, fungi, or parasites. Bacterial meningitis kills about 1 in 6 affected; the African meningitis belt bears the highest burden.

Meningitis due to adenovirus

Meningitis due to adenovirus (adenoviral meningitis, ICD-11 1C8E.2, ICD-10 A87.1) is a rare adenovirus infection of the meninges, spread hematogenously, causing fever, stiff neck, and headache, confirmed by CSF PCR.

Meningitis due to Cryptococcus neoformans

Meningitis due to Cryptococcus neoformans (cryptococcal meningitis): fungal CNS infection from inhaled C. neoformans, mainly in advanced HIV; diagnosed by CrAg and culture; treated with liposomal amphotericin B, flucytosine, fluconazole.

Meningitis due to Haemophilus influenzae

Meningitis due to Haemophilus influenzae (ICD-11 1D01.00), historically mainly Hib serotype b, was the leading cause of childhood bacterial meningitis before conjugate vaccines cut US cases by over 99%.

Meningitis due to mumps virus

Meningitis due to mumps virus is an aseptic meningitis caused when the mumps virus spreads to the membranes around the brain, occurring in up to 10% of unvaccinated mumps cases.

Meningitis due to Staphylococcus

Staphylococcal meningitis (ICD-11 1B54), bacterial meningitis from Staphylococcus aureus or epidermidis, usually after surgery or bloodstream spread; 4.9–6.4% of bacterial cases, mortality 14–50%, treated with vancomycin.

Meningitis due to Streptococcus

Meningitis due to Streptococcus (ICD-11 1B53), also called pneumococcal or streptococcal meningitis, is meningeal infection by Streptococcus, mainly S. pneumoniae and group B Streptococcus, with 24% pneumococcal case fatality.

Meningococcaemia

Meningococcaemia (meningococcemia, meningococcal septicaemia): bloodstream invasion by Neisseria meningitidis causing fever, purpuric rash, shock, and DIC; 10-15% case fatality, up to 40% in severe sepsis, treated with immediate parenteral antibiotics.

Meningococcal disease

Meningococcal disease, invasive infection by Neisseria meningitidis (meningococcus), causes bacterial meningitis and septicemia; six serogroups (A, B, C, W, X, Y) drive disease, with 10-15% case fatality and MenACWY/MenB vaccines for prevention.

Meningococcal groups a, b, c, w, and y vaccine

MenABCWY (pentavalent meningococcal groups A, B, C, W, and Y vaccine; Penbraya, Penmenvy) protects against five Neisseria meningitidis serogroups in people 10-25, used when both MenACWY and MenB vaccines are due at one visit.

Meningococcal vaccine

Meningococcal vaccine, also called MenACWY, MenB, or MenABCWY (Penbraya, Penmenvy), protects against Neisseria meningitidis serogroups A, B, C, W, and Y; conjugate vaccines replaced polysaccharide vaccines, cutting adolescent US disease over 90% since 2005.