morphism
(formally) An arrow in a category; (less formally) an abstraction that generalises a map from one mathematical object to another and is structure-preserving in a way that depends on the branch of mathematics from which it arises.
Being or having distinct variants of a plant or animal species in the same locale; polymorphism.

morphisms
plural of morphism

mortarboard
A rectangular board, with a handle, on which mortar or plaster is carried: a hawk.
An academic cap that has a flat square top with a tassel.

mortarboards
plural of mortarboard

mortaria
plural of mortarium

mortarium
A kind of mortar used by ancient Romans for grinding.

mosaul
Alternative form of mussaul.

mosauls
plural of mosaul

motocycle
A horseless carriage.

motocycles
plural of motocycle

motorbus
A motorized bus or coach.

motorbuses
plural of motorbus

motorbusses
plural of motorbus

motorcab
A taxi.

motorcabs
plural of motorcab

motormania
Synonym of automania (“enthusiasm for motor vehicles and motoring”).

mouldboard
A curved blade on a plough that serves to turn over the furrow.
A follow board.

mouldboards
plural of mouldboard

mouthbow
musical bow

mouthbows
plural of mouthbow

muchwa
Alternative form of mashua (“fishing vessel”).

muchwas
plural of muchwa

mudbucket
A bucket intended for scooping or holding mud.

mudbuckets
plural of mudbucket

mudsled
a small sled used by children to play on

mudsleds
plural of mudsled

muffie
Synonym of swimmie.

muffies
plural of muffie

mugful
As much as a mug will contain.

mugfuls
plural of mugful

mughouse
An alehouse; a pot-house.

mughouses
plural of mughouse

mugsful
plural of mugful

mugware
Mugs collectively.

mulie
A barge rigged with a spritsail main, and a large gaff rigged mizzen afore the steering wheel

mulies
plural of mulie

multimap
A data structure that maps a single key to multiple values.

multimaps
plural of multimap

multimeter
An electronic measuring instrument that combines multiple functions; a combined voltmeter, ammeter and ohmmeter.

multimeters
plural of multimeter

multiphonics
The sounding of two or more pitches simultaneously, either with the voice, or on an instrument that normally sounds only single notes.

multiplexation
The conversion of a signal to multiplex form

multiplexations
plural of multiplexation

multiprocessor
A computer that has multiple CPUs or execution units under an integrated control.

multiprocessors
plural of multiprocessor

muncheel
Alternative form of mancheel.

muncheels
plural of muncheel

munchil
Alternative form of mancheel.

munchils
plural of munchil

munsheel
Alternative form of mancheel.

munsheels
plural of munsheel

murderball
A team sport resembling dodgeball in which players are eliminated ("murdered") by being struck with the ball.
Wheelchair rugby.

murderbot
A robot that murders.

murderbots
plural of murderbot

muskball
A ball containing musk as a perfuming sachet.

muskballs
plural of muskball

mussal
Alternative form of mussaul.

mussals
plural of mussal

mussaul
A torch (flaming stick used as light source).
A torchbearer.

mussauls
plural of mussaul

mutawatir
A large chain of narrations in the hadiths

myelomalacia
The softening of the spinal cord.

myelon
The spinal cord.

myeloschisis
A developmental anomaly characterized by a cleft spinal cord, owing to failure of the neural plate to form a complete neural tube, or rupture of the neural tube after closure.

myelosyphilis
Syphilis of the spinal cord: a form of neurosyphilis (today the diagnosis would be neurosyphilis, as the implication that the rest of the central nervous system is spared is baseless).

myelotomies
plural of myelotomy

myelotomy
incision into the spinal cord

myoangiogenesis
angiogenesis in the myocardium

myotubule
myotube

myotubules
plural of myotubule

myxogastrian
Any slime mold of the class Myxogastria

myxogastrians
plural of myxogastrian

nabemono
Any of a variety of Japanese hot pot dishes.

nagware
Software that displays a message requesting that the user register it.

nail
The thin, horny plate at the ends of fingers and toes on humans and some other animals.
The basal thickened portion of the anterior wings of certain hemiptera.
The terminal horny plate on the beak of ducks, and other allied birds.
The claw of a bird or other animal.
A spike-shaped metal fastener used for joining wood or similar materials. The nail is generally driven through two or more layers of material by means of impacts from a hammer or other device. It is then held in place by friction.
A round pedestal on which merchants once carried out their business, such as the four nails outside The Exchange, Bristol.
An archaic English unit of length equivalent to ¹⁄₂₀ of an ell or ¹⁄₁₆ of a yard (2+¹⁄₄ inches or 5.715 cm).

nailbourne
A chalk stream that only flows intermittently.

nailbournes
plural of nailbourne

nailclipping
Alternative form of nail clipping.

nailclippings
plural of nailclipping

nailcutter
Alternative form of nail cutter.

nailcutters
plural of nailcutter

nailed
simple past and past participle of nail

naileries
plural of nailery

nailery
A manufactory of nails.

nailfile
Alternative form of nail file.

nailfiles
plural of nailfile

nailpolish
Alternative form of nail polish.

nailpolishes
plural of nailpolish

nails
plural of nail
The four round-topped pedestals outside the Corn Exchange in Bristol on which bargains used to be struck.

naker
A small drum, of Arabic origin, and the forebear of the European kettledrum.

nakers
plural of naker

nakir
Alternative form of naker (“type of drum”).

nakirs
plural of nakir

nalkee
Alternative form of nalki.

nalkees
plural of nalkee

nalki
A princely open litter, borne by many men using multiple poles.
Synonym of litter, especially one used by the bride or groom at a wedding.

nalkies
plural of nalky

nalkis
plural of nalki

nalky
Alternative form of nalki.

nanoactuator
A nanoscale actuator

nanoactuators
plural of nanoactuator

nanoball
A nanosize ball

nanoballs
plural of nanoball

nanobiotechnologies
plural of nanobiotechnology

nanobiotechnology
Any of several forms of biotechnology employing devices on the nano scale

nanoblade
A nanoscale blade

nanoblades
plural of nanoblade

nanocapacitor
A nanoscale capacitor

nanocapacitors
plural of nanocapacitor

nanocatheter
A nanoscale catheter

nanocatheters
plural of nanocatheter

nanocontainer
A nanoscale container.

nanocontainers
plural of nanocontainer

nanoeconomics
Economics at a lower level than microeconomics, sometimes dealing with individual transactions.

nanogear
A nanoscale gear

nanogears
plural of nanogear

nanogravette
A nanoscale gravette

nanogravettes
plural of nanogravette

nanohertz
A unit of frequency equal to one thousand-millionth (10⁻⁹) of a hertz, about once every 32 years

nanomechanism
Any nanoscale mechanism.

nanoneedle
A nanoscale needle

nanoneedles
plural of nanoneedle

nanonet
A net whose fibers have sizes within the range of nanometers.

nanonets
plural of nanonet

nanooptoelectronics
optoelectronics using nanosized components

nanoplate
A nanoscale plate.

nanoplates
plural of nanoplate

nanopump
A nanoscale pump

nanopumps
plural of nanopump

nanoresonator
A nanoscale resonator.

nanoresonators
plural of nanoresonator

nanorobotics
The science and technology of designing and manufacturing nanoscale machines, especially robotic machines.

nanosat
nanosatellite

nanosatellite
An artificial satellite with a wet mass between 1 and 10 kilograms.

nanosatellites
plural of nanosatellite

nanosats
plural of nanosat

nanosensor
A nanoscale sensor

nanosensors
plural of nanosensor

nanospring
A nanoscale spring

nanosprings
plural of nanospring

nanostring
A nanoscale string

nanostrings
plural of nanostring

nanosurgeon
A robot that performs nanosurgery.

nanosurgeons
plural of nanosurgeon

nanosyringe
A nanoscale syringe (especially one that is part of a lab on a chip)

nanosyringes
plural of nanosyringe

nanothread
A nanoscale thread