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 megaderm Any of several species of Old World blood-sucking bats of the genus Megaderma; the false vampire bat. megadermatid Any bat in the family Megadermatidae. megadestruction Very large-scale destruction, especially resulting from nuclear warfare. megadeveloper A very large developer. megadevelopment A very large real estate development. megadick A macropenis. megadisaster An unexpected natural or man-made catastrophe of exceptional magnitude, causing unusually severe or unprecedented damage. megadiverse Exhibiting great diversity, especially great biodiversity. megadiversity Very great diversity. megadolichocolon An excessively long, dilated colon megadollar Of a million dollars or more. megadomain A large domain on certain chromosomes megadome A large dome-shaped building used for concerts, sports etc megadonor Someone who donates a lot, or who is responsible for a large amount of donations flowing to a person or entity. megadont Having large teeth megadontia Malformation of megalodontia megadontism Synonym of macrodontia (“condition of having unusually large teeth”). megadonty Synonym of macrodontia (“condition of having unusually large teeth”). megadosage An extremely large dosage. megadose A dose of drug or vitamin far exceeding the normal or recommended amount, and usually given intentionally. Compare overdose. megadouche A highly objectionable person. megadrile A terrestrial oligochaete (worm of the superorder Megadrilacea in class Oligochaeta) megadrought A drought lasting for decades or centuries. megadude A man who is very cool, stylish, etc. megaduke The commander-in-chief of the Byzantine navy. megadumb Extremely stupid. megadump A very large dump, or site for discarding waste. megaduodenum Abnormally large size of the duodenum. megadyne A unit of force equal to one million dynes megaearthquake An earthquake of very large magnitude. megaenzyme A very large enzyme Megaera One of the Furies, Erinyes in Greek mythology, the cause of jealousy and envy, who punishes people who commit crimes, especially marital infidelity. megaesophagus A condition where peristalsis fails to occur properly and the esophagus is enlarged. megaevent A very large-scale event. megaevolution Very large-scale evolution megafab A very large-scale manufacturing plant, especially one producing silicon chips. megafactory A very large manufacturing facility. megafamous Very famous. megafan A very large mass of clastic sediment deposited by a laterally mobile river system that fans out from the outlet from a large mountainous drainage network. megafarad A unit of quantity of electric charge; the quantity of electricity flowing through a one megohm resistor when driven by an electromotive force of one volt for one second. megafarm A very large, factory-style farm. megafauna The large animals of a given region or time, considered as a group. megafaunal Of or pertaining to megafauna. megafelid big cat megafestival A very large-scale festival. megafight A major fight with heavy promotion (in boxing, wrestling, etc.). megafinance High finance: finance involving very large scales and sums of money megafire A very large wildfire, typically one covering more than 100,000 acres. megafirm A very large firm. megafish Any fish belonging to the megafauna. megaflare A very large solar flare megaflood A sudden discharge of an exceptionally large volume of water megaflop megaflops (one million FLOPS, or floating point operations per second) megaflops a measure of the speed of a computer; one million floating point operations per second. megaflora Any exceptionally large plant. megafloral Of or pertaining to megaflora. megafoot A unit of length equal to one million feet. megaforce A great or united force. megaform A series of buildings linked by a physical framework megafortune A fortune of an amount in the millions. megafossil A relatively large fossil showing the structure of an organism. megafragment A very large fragment. megafraud Extremely large-scale fraud. megafrugivore A relatively large frugivore megafrustule A relatively large frustule megafund A major money-management operation dealing with large amounts of money. megagallery A very large commercial art gallery that operates globally. megagallon A unit of volume equal to one million gallons. megagame A very large, or highly successful, game. megagamete A macrogamete. megagametocyte Synonym of macrogametocyte. megagametogenesis The development of a megaspore into an embryo sac. megagametophyte Any gametophyte that develops from a megaspore. megagametophytic Relating to megagametophytes megagauss A unit equal to one million gauss. megagenome A very large genome megagenomic Relating to megagenomes or to megagenomics megagenomics The study of megagenomes megageomorphological Relating to megageomorphology. megageomorphology Large-scale geomorphology. megagift A donation to charity of millions of dollars. megagnathia macrognathia megagnathous Having a large jaw megagon A polygon with one million sides. megagram An SI unit of mass equal to 10⁶ grams. Symbol: Mg megagroup A particularly large group, bigger than a supergroup. megagrowth Extraordinary growth, especially in finance or industry. megahabitat A very large habitat, typically in the deep sea megahack A writer who is very much a hack. megahash A million hashes. megahenry An SI unit of electrical inductance equal to 10⁶ henrys. Symbol: M megaherb Any relatively large herb (plant). megaherbivore Any very large herbivore, typically one weighing more than 1000 kg megaherbivorous relating to a megaherbivore megahero A very great hero. megahertz A unit equal to one million cycles per second. megahex A regular, quasi-circular polygon made up of multiple hexagons used to indicate a different scale, range, or area of effect on a hexagonal grid. Commonly used on maps for some tabletop war games and roleplaying games. megahistorical Of or relating to megahistory. megahistory An extreme form of macrohistory, dealing with particularly large cultures over very long periods of time. megahit A large success or hit. megahome A very large and luxurious home. megahospital A very large hospital megahotel A very large and luxurious hotel. megahurt megahertz. megahype Extreme hype. megaichnofauna Relatively large ichnofauna megaindustrial Pertaining to a megaindustry. megaindustry A large-scale industry. megainfluencer An Internet celebrity with a very large following on a social media platform (especially someone with more than 1 million followers). megaintestine An abnormal dilation of the intestine megaisochore A large macroisochore megajail Synonym of megaprison. megajerk A particularly objectionable jerk. megajoule An SI unit of energy equal to 10⁶ joules. Symbol: MJ megajournal An online academic journal that focuses on publishing articles in large quantities and reduces the role of peer review in article acceptance. megakalsilite A hexagonal-pyramidal colorless mineral containing aluminum, oxygen, potassium, and silicon. megakaryoblast A precursor cell in hematopoiesis which gives rise to the promegakaryocyte, which in turn gives rise to the megakaryocyte. megakaryoblastic Of or pertaining to a megakaryoblast megakaryocyte A large cell, found in bone marrow, responsible for the production of platelets. megakaryocytic Of, pertaining to, or containing megakaryocytes megakaryocytopoiesis The cellular development process that leads to platelet production. megakaryocytopoietic Relating to megakaryocytopoiesis. megakaryocytosis cytosis involving megakaryocytes megakaryogenesis The formation and development of megakaryocytes megakaryopoiesis The production of megakaryocytes. megakaryopoietic Relating to megakaryopoiesis megakaryothrombopoiesis The process of megakaryocyte development that leads to platelet production. megakike One million Jews. megaladapid Any extinct lemur in the family Megaladapidae. megalaesthete A relatively large photoreceptor in the megalopore of a chiton megalake A very large lake, especially a prehistoric one megaleak A very large-scale or significant leak of information. megalencephalic macrencephalic; having a large brain megalencephaly Synonym of macrencephaly. megalerg A unit of one million ergs. Megalesia An ancient Roman festival from April 4 to April 10 in honour of Cybele. Megalesian Pertaining to, or in honour of, Cybele. megalethoscope An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. megalichthyid Any extinct fish in the family Megalichthyidae. megalichthyiform Any extinct fish of the order Megalichthyiformes megalin A particular low-density transmembrane lipoprotein megalineation A very large lineation (typically as a result of glaciation) megalith A large stone slab making up a prehistoric monument, or part of such a monument. megalithic Of or pertaining to megaliths, to the people who made them, or to the period when they were made. megalithically In a megalithic manner. megalithism The culture surrounding the building of megaliths. megalitre A unit of volume equivalent to 1,000,000 litres. Symbol: ML or Ml. megaloblast An abnormally large red blood cell associated with pernicious anemia and with folic acid deficiency. megaloblastic Pertaining to, or produced by a megaloblast megaloblastoid Relating to, or characterised by megaloblasts.