Skip to content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z megaphallus An abnormally large penis; macropenis, macrophallus megaphanerophyte Any tree having a height greater than 2 metres, 5 metres or about 30 metres (depending on classification). megapharmacy A very large pharmacy. megaphone A portable, usually hand-held, funnel-shaped device that is used to amplify a person’s natural voice toward a targeted direction. megaphonia The condition of excessive shouting or raising the voice. megaphonic Of, or pertaining to, a megaphone megaphonically In a megaphonic manner. megaphonist Someone who uses a megaphone. megaphyll A leaf having an internally branching system of veins, or a structure that is derived from such a leaf. megaphyllous Of or having megaphyll leaves megaphylly The condition of having large leaves. megaphylogeny Relatively large-scale phylogeny megaphyte Any plant having an unbranched stem or trunk and a crown of large leaves megapixel One million pixels, used as a unit of resolution of digital cameras. megaplan A large-scale plan, especially one relating to construction. megaplankton The largest plankton (greater than about 20 centimetres in maximal dimension) megaplant A very large industrial plant. megaplaque A large plaque (clearing in a bacterial lawn) megaplasmid A very large bacterial plasmid megaplastic Particles or pieces of waste plastic above 50 cm (19.69 in) in size, a common marine pollutant. megaplex A large, multi-screen cinema megaplume A very large plume or column of water. megapod megapode megapodagrionid Any damselfly in the family Megapodagrionidae; a flatwing. megapode Any of several chicken- or turkey-like birds in the family Megapodiidae, which incubate their eggs by burying them where they receive warmth from decaying vegetation, solar radiation or geothermal heat. megapodid Any bird in the family Megapodiidae; a megapode or mound builder. megapolis A very large city or urban complex; a metropolis. megapolitan Of or pertaining to a megapolis (“a very large city or urban complex”). megapolitical Of or relating to megapolitics. megapolitics Very large-scale politics. megapop Highly successful mainstream pop music. megapopular Extremely popular. megapopulation A very large population. megaport An extremely large port, especially one that combines support for air, naval, and/or terrestrial travel. megaportal A very large, successful portal web site. megapost An extremely long posted message, often made up of a collection of related posts. megapound A non-SI unit of force equal to 1 million pounds-force. megaprepuce Pathological preputial enlargement. megaprimary A primary election for president that takes place on the same day across a wide geographic area covering many voters. megaprime A prime number with at least one million decimal digits. megaprimer A mutagenesis technique that uses three oligonucleotide primers to perform two rounds of polymerase chain reaction megaprison An extremely large prison. megaproducer A particularly successful producer. megaprofit A vast profit. megaproject A very large public investment project, especially one costing more than one billion US dollars. megaprosthesis A large prosthesis, typically used to replace a limb. megaprosthetic Relating to a megaprosthesis. megaprotein An extremely large protein. megaquake A megathrust earthquake. megaquartz A type of large quartz present as individual crystals and clusters of crystals, as well as overgrowths on detrital quartz grains, found in Quaternary dolomites. megara A city west of Athens in Attica, Greece. megarad A unit of radiation equivalent to one million rads. megaraptor A member of the genus Megaraptor of large theropod dinosaurs that lived in the Turonian to Coniacian ages of the Late Cretaceous. megaraptoran A carnivorous theropod dinosaur of the clade Megaraptora megaraptorid Any theropod dinosaur of the family †Megaraptoridae. megararity An extremely rare bird for a particular locality. megarayleigh A unit of brightness equal to one million rayleighs. megaread A million reads (the identification of a million bases in a genome) megarecession A major economic recession. megarectum An abnormally large rectum. megaregion A megalopolis. megaregional Relating to a megaregion. megaregolith A layer of fractured bedrock beneath the lunar regolith megaresort A very large-scale resort megaretailer A retailer that operates on a very large scale. megarhine Relating to, or characteristic of the extinct large-nosed rhinoceros †Rhinoceros megarhinus Megarian Of, from, or pertaining to, Megara Megaric Of, from, or pertaining to, Megara megarich Extremely rich; having a lot of money. megaripple A giant ripple, typically of sand exposed to tidal action. megaron The rectangular great hall in a Mycenaean building, usually supported with pillars. megasample A million samples megasatellite A large DNA tandem repeat megasauropod Any exceptionally large sauropod dinosaur. megascale Extremely large-scale megascience An area of scientific inquiry which is so complex and/or expensive that international collaboration is required to investigate it. megasclere A large spicule in sponges, visible to the naked eye. megascolecid Any earthworm of the family Megascolecidae. megascolecine Belonging or related to the Megascolecidae family of earthworms. megascope A modification of the magic lantern, used especially for throwing a magnified image of an opaque object on a screen, solar or artificial light being used. megascopic Visible to the naked eye. megascopical megascopic megascopically In a megascopic manner. megasea Any bergenia of the former genus Megasea megasecond An SI unit of time equal to 10⁶ seconds. Symbol: Ms. (= 11.5741 days) megasecopteran Any insect of the order Megasecoptera. megaseism A large or severe earthquake. megaseismic Of or relating to a megaseism. megaseller A book or other product that has sold in extremely large numbers. megaselling Selling millions of units. megaseme Having the orbital index relatively large, therefore having eye sockets nearby. megasequence A very large sequence of strata megaseries A series that is much longer than is usually the case. megaservice A large and complex service (economic activity). megashark A very large shark. megashear A very large shear, typically tens to hundreds of kilometres in length. megashed A massive store, warehouse, or distribution center, especially one with a plain or unattractive exterior. megaship a very large ship; a ship that is among the world's largest megashort Very short. megasiemens One million siemens. megasigmoid Abnormal enlargement of the sigmoid colon. megaslump A very large (geological) slump. megaslut A superslut; an extremely slutty person megasmash A very successful smash hit. megasociety A very large-scale society. megasome A large lysosome megasonic Having a frequency much greater than ultrasonic, typically above 1000 kHz megaspace An especially large space. megaspilid Any parasitic wasp in the family Megaspilidae. megaspirid Any snail in the family Megaspiridae. megasporange A large sporange. megasporangial Of or pertaining to megasporangia. megasporangiate Having megasporangia megasporangium A sporangium which produces only megaspores megaspore The larger spore of a heterosporous plant, typically producing a female gametophyte megasporic Pertaining to a megaspore. megasporizine An organic compound produced by Penicillium megasporum fungi. megasporocarp A large sporocarp containing a megasporangium megasporocyte a megaspore mother cell megasporogenesis The formation of megaspores in angiosperms megasporophyll A sporophyll that bears megasporangia. megasporophyte A sporophyte that produces megaspores megass Bagasse. megastar A very famous or successful celebrity. megastardom The state of someone acknowledged as a megastar. megastate A very large geopolitical state. megasthenic Having a typically large size; belonging to the Megasthenes, in former taxonomic classifications. megastigmatrienone A carotenoid-derived aromatic compound that produces some of the spice notes associated with Chardonnay wines. megastome One of a group of univalve shells, having a large aperture or mouth. megastore A large supermarket or similar retail outlet; a superstore. megastorm A major storm (weather phenomenon) capable of causing catastrophic damage. megastrobilus An ovulate cone bearing ovuliferous scales, found in gymnosperms such as the conifers. megastructural Of or pertaining to megastructures. megastructuralist An architect favouring megastructuralism. megastructure A very large structure. megastudio A large film studio. megastudy A relatively large study megasuccessful Very successful. megasyndrome The pathological enlargement of an organ etc megasynthase A large, complex synthase (that produces a specific natural product as if on an assembly line) megasynthetase Any large, complex synthetase megatall A building approximately between 600 meters and 900 meters tall, (between 2000 feet and 3000 feet tall). A building taller than a supertall. megataxonomy Relatively large-scale taxonomy megateam A very large or successful team. megatechnics Very large-scale technology. megaterror Large-scale terrorism. megathere An extinct, gigantic, ground sloth (Megatherium americanum) that flourished in South America during the Pleistocene epoch. megatherial Relating to, or characteristic of any member of the genus megatherium megatherian Relating to, or characteristic of a megatherium megatherid Any ground sloth of the extinct family †Megatheriidae of giant ground sloths.