megalodontia
The condition of having proportionately oversized teeth for the jaw in which they are set.

megaloencephaly
Alternative form of megalencephaly.

megalomania
A psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence.
Narcissistic personality disorder.
An obsession with grandiose or extravagant things or actions.

megalomaniacism
megalomania

megalomanias
plural of megalomania

megalopenis
The condition of having an abnormally large penis; macropenis

megalopenises
plural of megalopenis

megalophobia
The fear of large objects.

megalopoleis
plural of megalopolis

megalopoli
plural of megalopolis

megalopolis
A large conurbation, where two or more large cities have sprawled outward to meet, forming something larger than a normal metropolis.

megalopolises
plural of megalopolis

megalopolitanism
Megalopolitan attitudes generally.

megalopolization
The process of megalopolizing.

megalopore
A relatively large pore in the shell of a chiton

megalopores
plural of megalopore

megalopsychia
greatness of soul; magnanimity

megalopsychy
Excessive self-confidence

megaloschizont
A very large schizont

megaloschizonts
plural of megaloschizont

megaloscope
A type of speculum that magnifies the orifice.

megaloscopes
plural of megaloscope

megalourethra
A form of uropathy characterized by severe dilatation of the penile urethra

megalourethras
plural of megalourethra

megamansion
A very large mansion.

megamansions
plural of megamansion

megamenu
A dropdown menu that expands into a relatively large and complex interface rather than a simple vertical list of commands.

megamerger
A particularly large economic merger.

megamergers
plural of megamerger

megamidden
An exceptionally large midden

megamiddens
plural of megamidden

megamillennia
plural of megamillennium

megamillennium
A period of time consisting of a million years.

megamillenniums
plural of megamillennium

megaministries
plural of megaministry

megaministry
A very large (especially religious) ministry.

megamitochondria
plural of megamitochondrion

megamitochondrion
A very large, misshapen mitochondrion

megamonument
A very large monument.

megamonuments
plural of megamonument

megamovie
A particularly long or impressive movie.

megamovies
plural of megamovie

meganewton
One million newtons.

meganewtons
plural of meganewton

megannum
Alternative form of mega-annum.

megannums
plural of megannum

megaorder
magnorder

megaorders
plural of megaorder

megapack
A particularly large pack (group or bundle).

megapacks
plural of megapack

megapanel
A very large glass window panel.

megapanels
plural of megapanel

megaparsec
An astronomical unit of distance equal to 1 million parsecs.

megaparsecs
plural of megaparsec

megaphage
A large form of bacteriophage

megaphages
plural of megaphage

megaphagosome
A very large phagosome, typically formed by the action of a virus

megaphagosomes
plural of megaphagosome

megaphylly
The condition of having large leaves.

megaplankton
The largest plankton (greater than about 20 centimetres in maximal dimension)

megaplaque
A large plaque (clearing in a bacterial lawn)

megaplaques
plural of megaplaque

megaplasmid
A very large bacterial plasmid

megaplasmids
plural of megaplasmid

megaplume
A very large plume or column of water.

megaplumes
plural of megaplume

megapopulation
A very large population.

megapopulations
plural of megapopulation

megaportal
A very large, successful portal web site.

megaportals
plural of megaportal

megapost
An extremely long posted message, often made up of a collection of related posts.

megaposts
plural of megapost

megaprofit
A vast profit.

megaprofits
plural of megaprofit

megaproject
A very large public investment project, especially one costing more than one billion US dollars.

megaprojects
plural of megaproject

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.

megarecession
A major economic recession.

megarecessions
plural of megarecession

megaregolith
A layer of fractured bedrock beneath the lunar regolith

megaregoliths
plural of megaregolith

megasatellite
A large DNA tandem repeat

megasatellites
plural of megasatellite

megasclere
A large spicule in sponges, visible to the naked eye.

megascleres
plural of megasclere

megaseism
A large or severe earthquake.

megaseisms
plural of megaseism

megasequence
A very large sequence of strata

megasequences
plural of megasequence

megaseries
A series that is much longer than is usually the case.

megaservice
A large and complex service (economic activity).

megaservices
plural of megaservice

megashear
A very large shear, typically tens to hundreds of kilometres in length.

megashears
plural of megashear

megasiemens
One million siemens.

megasmash
A very successful smash hit.

megasmashes
plural of megasmash

megasome
A large lysosome

megasomes
plural of megasome

megaspace
An especially large space.

megaspaces
plural of megaspace

megasporange
A large sporange.

megasporanges
plural of megasporange

megasporocarp
A large sporocarp containing a megasporangium

megasporocarps
plural of megasporocarp

megasporogeneses
plural of megasporogenesis

megasporogenesis
The formation of megaspores in angiosperms

megastar
A very famous or successful celebrity.

megastardom
The state of someone acknowledged as a megastar.

megastars
plural of megastar

megastome
One of a group of univalve shells, having a large aperture or mouth.

megastomes
plural of megastome

megastore
A large supermarket or similar retail outlet; a superstore.
A big box.

megastores
plural of megastore

megastructure
A very large structure.
A very large structure.
A very large structure.
The large-scale structure of a material, as contrasted to the fine-scale structure.

megastructures
plural of megastructure

megastudies
plural of megastudy

megastudy
A relatively large study

megateam
A very large or successful team.

megateams
plural of megateam

megatheroid
One of a family of extinct edentates found in America, including the megatherium and the megalonyx, among others.

megatheroids
plural of megatheroid

megathread
An extremely long discussion thread.

megathreads
plural of megathread

megathrombocyte
A very large thrombocyte

megathrombocytes
plural of megathrombocyte

megathrombocytosis
Synonym of macrothrombocytosis.

megatick
A greatly desirable addition to the list of birds one has seen, usually because it is rare or seldom seen.

megatragedies
plural of megatragedy

megatragedy
A huge tragedy.

megatransposon
A relatively large transposon

megatransposons
plural of megatransposon

megatype
An enlarged print

megatypy
enlargement

megaunit
A unit equal to one million of another unit.

megaverdict
A legal verdict that awards damages of a million dollars or more.

megaverdicts
plural of megaverdict

megavoltage
A voltage in the region of millions of volts.

megavoltages
plural of megavoltage

megawealth
Very great wealth.

megawhaleback
A very large whaleback

megawhalebacks
plural of megawhaleback

megayacht
A very large luxury yacht.

megayachts
plural of megayacht

megayear
A million years: a thousand thousand years.

megayears
plural of megayear

megazoo
A very large zoo.

megazoos
plural of megazoo

megazoospore
A relatively large algal zoospore

megazoospores
plural of megazoospore

megibyte
Misspelling of mebibyte.

megillah
any of the Five Scrolls of the Hebrew Scriptures (Song of Songs, Ruth, Lamentations, Ecclesiastes, and Esther)
the Book of Esther

megillahs
plural of megillah

megillot
plural of megillah

megilloth
plural of megillah

megilp
A mixture of linseed oil with turpentine or mastic varnish, used as a thickener for oil paints but later discredited as a source of cracking and yellowing.

megilph
Alternative form of megilp.

megilphs
plural of megilph

megilps
plural of megilp

megodontia
Rare form of megalodontia