All articles starting with M
36,687 articles
Metaflumizone
Metaflumizone (CAS 139968-49-3), a semicarbazone sodium channel blocker insecticide (IRAC group 22) co-developed by BASF and Nihon Nohyaku; used in ProMeris flea spot-on and crop protection; EU plant-protection approval expired 2024 and later withdrawn by industry.
Metafont
Metafont is a font compiler and programming language created by Donald Knuth to describe typefaces as programs, producing the Computer Modern fonts used with his TeX typesetting system.
metafor
metafor is a free, open-source package for the R statistical environment that provides functions for conducting meta-analyses, written and maintained by Wolfgang Viechtbauer and distributed on CRAN.
Metagenesis in cnidarians
Metagenesis in cnidarians is the alternation between an asexually reproducing, typically sessile polyp generation and a sexually reproducing, free-swimming medusa generation, though scyphozoan polyps can also bypass the medusa stage.
Metagenome
Metagenome: the collective genome of the microorganisms in a community (term coined 1998). Studied by 16S rRNA amplicon or shotgun metagenomics; shotgun adds species-strain resolution, function, MAG recovery.
Metagenome sequencing
Metagenome sequencing, or shotgun metagenomics, sequences DNA extracted directly from a whole microbial community without culturing; pioneered on Sargasso Sea seawater in 2004, it now spans gut studies and clinical diagnostics.
Metagenomi
Metagenomi, now Metagenomi Therapeutics, is an Emeryville, California in vivo genome editing company founded in 2016 by Brian C. Thomas, publicly traded since its February 2024 IPO.
Metagenomic binning
Metagenomic binning, also called genome binning, is a computational method that groups sequencing reads or contigs from a mixed microbial sample into bins, each representing one organism's genome, turning metagenome assemblies into metagenome-assembled genomes (MAGs).
Metagenomic next-generation sequencing
Metagenomic next-generation sequencing (mNGS) is an unbiased diagnostic method that sequences all nucleic acids in a clinical sample, detecting bacteria, viruses, fungi, and parasites without culture.
Metagenomics
Metagenomics: culture-independent sequencing of DNA from environmental or clinical samples to analyze whole microbial communities. Also called shotgun metagenomics; distinct from 16S amplicon surveys; used in microbiome research, pathogen detection, and outbreak surveillance.
MetaGPT
MetaGPT is an open-source multi-agent framework, first released in 2023, that assigns LLM agents software-company roles and turns a one-line requirement into code and documentation.
Metagratings
Metagratings are sparse periodic arrays of subwavelength scatterers that redirect electromagnetic, acoustic, or elastic waves into a chosen diffraction order while suppressing the others, proposed in 2017.
Metaheuristic
A metaheuristic, also known as a meta-algorithm, is a problem-independent framework for building heuristic optimization algorithms, used when problems like scheduling and vehicle routing are too complex for exact methods.
Metahuman
Metahuman: DC Comics term for humans with an activated Meta-Gene granting superpowers (Invasion! #1, 1988); also a 1969 philosophical/genre term and Epic Games' MetaHuman digital-human tool (2021).
Metai
Metai, Lithuanian for "The Years" or "Seasons," is a monthly literary and cultural journal published in Vilnius since 1991, when it replaced the Soviet-era journal Pergalė.
Metairie Cemetery
Metairie Cemetery is a New Orleans garden cemetery founded in 1872 on the former Metairie Race Course, designed by Benjamin Morgan Harrod around the track's oval, with grand above-ground tombs, notable burials, and 1991 National Register listing.
Metairie, Louisiana
Metairie, Louisiana: unincorporated census-designated place in Jefferson Parish, just west of New Orleans. Largest parish community, 143,507 people in 2020; name from French métairie, a sharecropped farm on Metairie Ridge.
Metakaolin
Metakaolin is an amorphous aluminosilicate produced by heating kaolinitic clay to about 700 °C, destroying the kaolinite crystal structure and creating a highly reactive pozzolan.
Metal
A metal is a chemical element that conducts heat and electricity, forms positive ions, and has a characteristic luster; iron makes up 90% of metal refined today.
Metal (API)
Metal, also known as Apple Metal, is a low-overhead graphics and compute API developed by Apple for its own GPUs across iPhone, iPad, and Mac, first announced in 2014.
Metal allergy
Metal allergy is a delayed-type hypersensitivity reaction in which metal ions such as nickel, cobalt, and chromium cause allergic contact dermatitis, typically 24 to 72 hours after exposure.
Metal artifact reduction
Metal artifact reduction (MAR) is a set of CT image-processing methods that suppress streaks and distortion caused by metal implants such as hip prostheses and dental fillings.
Metal bis(trimethylsilyl)amides
Metal bis(trimethylsilyl)amides are coordination compounds containing the bulky amide ligand N(SiMe3)2; the commercially available LiHMDS, NaHMDS, and KHMDS serve as strong, non-nucleophilic bases, while the ligand stabilizes low-coordinate metal complexes across the periodic table.
Metal Blade Records
Metal Blade Records, founded 1982 by Brian Slagel from his mother's garage in Woodland Hills, California, is a US independent heavy metal label. Its Metal Massacre compilation carried Metallica's debut recording; it released early Slayer, signed Cannibal Corpse, and was never sold.
Metal Box
Metal Box is the 1979 second album by Public Image Ltd, released by Virgin as three 12-inch 45 rpm records in a metal film canister, reissued as Second Edition in 1980, peaking at UK number 18.
Metal Build (Gundam)
Metal Build is a premium action figure line from Bandai, launched in March 2011, featuring Gundam and other mecha with diecast metal parts, fine paintwork, and extensive articulation.
Metal carbon dioxide complex
A metal carbon dioxide complex is a coordination complex where a CO2 molecule binds a metal center as a ligand, activating it for reduction and other reactions.
Metal carbonyl
A metal carbonyl, or metal carbonyl complex, is a coordination complex in which carbon monoxide ligands are bonded to a transition metal, first synthesized as nickel tetracarbonyl in 1890.
Metal Cardbot (메탈카드봇)
Metal Cardbot (메탈카드봇) is a South Korean 3D mecha animation by SAMG Entertainment, first aired March 29, 2023, about robot vehicles from destroyed Planet Machina hiding on Earth, befriended by boy Jun via the Metal Breath device; three seasons with rising ratings and China, Russia expansion.
Metal Church
Metal Church is an American heavy metal band formed in San Francisco in 1980 by guitarist Kurdt Vanderhoof, later based in Aberdeen, Washington, and known for its 1984 self-titled debut.