All articles starting with M

Micronauts (comics)

Micronauts is Marvel Comics' 1979–1984 series (59 issues) by Bill Mantlo and Michael Golden, based on Mego's Takara Microman toy line, set in the Microverse against Baron Karza, with later runs at Image, Devil's Due, IDW, and Marvel reprints from 2023.

Microneedle drug delivery

Microneedle drug delivery administers medications through arrays of microscopic needles that cross the skin's outer barrier with little or no pain, and includes solid, coated, dissolving, hollow, and hydrogel-forming devices.

Microneedling

Microneedling, also known as collagen induction therapy, is a minimally invasive dermatologic procedure that uses fine needles to trigger new collagen for treating scars and wrinkles.

Micronesia

Micronesia, from Greek for 'small islands', is the northwestern Pacific subregion of Oceania alongside Melanesia and Polynesia, covering Palau, the Marianas, Carolines, Marshalls, Gilberts, Nauru and Banaba, with about 2,628 km2 of land.

Microneurography

Microneurography is an electrophysiological method recording action potentials from sensory and sympathetic nerve fibers in conscious humans, introduced by Karl-Erik Hagbarth and Åke Vallbo in Uppsala in 1966.

Microneutralization assay

The microneutralization assay is a serological test measuring whether serum antibodies, primarily against hemagglutinin, neutralize live virus in cultured cells, used chiefly for influenza and pandemic virology.

Micronization

Micronization is a materials processing technique that reduces solid particles to micrometer and sub-micrometer sizes, most often by dry jet milling, to improve dissolution and solubility.

Oct 22, 2026

Micronova

A micronova is a localized thermonuclear explosion on a white dwarf's surface, roughly a million times weaker than a nova and lasting only hours, first reported in 2022.

Micronucleus assay

The micronucleus assay is a cytogenetic test that detects small extranuclear bodies containing chromosome fragments or whole chromosomes in divided cells, identifying substances that break chromosomes or cause their loss.

Micronutrient

Micronutrient: vitamins and minerals (about 30, including 13 vitamins and 16 minerals) needed in tiny amounts for enzymes, hormones, and growth. Key facts: iron, vitamin A, iodine deficiencies most common; 42% of under-fives anaemic; prevented by fortification, supplementation, diverse diets.

Oct 20, 2026

Micronycteris

Micronycteris (big-eared bats), genus of Neotropical phyllostomid bats from Mexico to Paraguay; 13 recognized species in four subgenera, with molecular studies indicating at least 27 lineages.

Microorganism

Microorganism (microbe): organism too small to see without a microscope; includes bacteria, archaea, fungi, protists, algae, and viruses. Distinguished by acellular viruses, polyphasic prokaryotic species taxonomy, and roles in nutrient cycling and fermentation.

Micropatterning

Micropatterning is a set of microfabrication techniques that arrange biomolecules, usually extracellular-matrix proteins, on a culture surface in defined geometries, fixing where and how cells attach.

Micropenis

Micropenis: a structurally normal penis with stretched penile length over 2.5 SD below the age-matched mean; under 2 cm at birth, under 4 cm after age 5. Causes include hypogonadism; treated with early testosterone or DHT.

Micropeptide inhibiting actin cytoskeleton

MIAC (micropeptide inhibiting actin cytoskeleton) is a 51-aa micropeptide encoded by lncRNA AC025154.2/RP11-469H8.6; it binds AQP2, suppresses SEPT2/ITGB4 and EREG/EGFR signaling, acting as a tumor suppressor in HNSCC and renal cell carcinoma.

Microperimetry

Microperimetry is a psychophysical eye test measuring retinal light sensitivity at defined points while infrared fundus tracking assigns each stimulus to a known retinal location.

Oct 15, 2026

MicroPets

MicroPets (マイクロペット) is a series of palm-sized pet robots made by the Japanese toy company Takara Tomy, first sold in 2002 and certified by Guinness as the world's smallest voice-activated electric toy.

Micropezidae

Micropezidae, the stilt-legged flies, is a family of about 700 slender, long-legged Diptera in Nerioidea, in five subfamilies, worldwide except Antarctica and New Zealand, known for ant and ichneumon wasp mimicry and waving white fore tarsi.

Microphone

A microphone is a transducer that converts sound pressure waves into electrical signals, used in recording, telephones, hearing aids, and voice assistants since Edison's 1877 carbon transmitter.

Microphthalmia with limb anomalies

Microphthalmia with limb anomalies (ophthalmo-acromelic syndrome, Waardenburg anophthalmia syndrome, OMIM 206920) is a rare autosomal recessive disorder of absent or small eyes with hand and foot malformations, mostly caused by biallelic SMOC1 mutations.

Microphthalmia with linear skin defects syndrome

Microphthalmia with linear skin defects syndrome (MLS, MIDAS, Gazali-Temple syndrome) is a rare X-linked dominant, male-lethal disorder of HCCS, COX7B, or NDUFB11 causing microphthalmia and linear facial skin defects in females.

Microphthalmia-retinitis pigmentosa-foveoschisis-optic disc drusen syndrome

Microphthalmia-retinitis pigmentosa-foveoschisis-optic disc drusen syndrome, also called nanophthalmos-RP-foveoschisis-optic disc drusen syndrome or MCOP5, is a rare autosomal recessive MFRP-related eye disorder with posterior microphthalmia, retinal dystrophy, foveal schisis, and optic disc drusen.

Microphthalmia, Lenz type

Microphthalmia, Lenz type (Lenz microphthalmia syndrome, OMIM 309800) is a rare X-linked recessive syndromic microphthalmia affecting males, with small or absent eyes, coloboma, ear, dental, skeletal, and urogenital anomalies, and intellectual disability, linked to BCOR and NAA10.