umu
An earth oven used in New Zealand, Samoa, and other Pacific islands, consisting of a hole dug in the ground and lined with heated stones.

umus
plural of umu

undercompetence
An insufficient level of ability, skills, or knowledge that is required for a specific job, task, or role.

undercoordination
An insufficient level of coordination

undercoordinations
plural of undercoordination

underdamper
A damper located beneath the hammers in a piano.

underdampers
plural of underdamper

underpollution
A relatively low level of pollution.

undersphere
A sphere which is smaller than, and in its movements subject to, another; a satellite.
An inferior sphere, or field of action.

underspheres
plural of undersphere

undertype
A kind of steam wagon having the engine below the cab.
The type of coin used as a blank in the creation of a new coin.

undertypes
plural of undertype

unicom
An air-ground communication facility operated by a private agency (not air traffic control) to provide advice at uncontrolled aerodromes and airports and to provide non-flight services such as requesting a taxi.

unicoms
plural of unicom

unikernel
A specialised, fixed-purpose machine image which can run directly on hardware or a hypervisor without an operating system such as Linux.

unikernels
plural of unikernel

unireme
Synonym of monoreme.

uniremes
plural of unireme

upher
a wooden pole used as scaffolding

uphers
plural of upher

upmodulation
modulation to a higher level

upmodulations
plural of upmodulation

upstroke
The upward stroke of a pen, brush, piston, etc.

upstrokes
plural of upstroke

ureterolith
A stone in a ureter.

ureteroliths
plural of ureterolith

urethra
The tube through which urine exits the body and, in male placental mammals, through which semen is ejaculated.

urethrae
plural of urethra

urethras
plural of urethra

urostege
One of the plates on the underside of a snake's tail.

urosteges
plural of urostege

userbox
A simple, standardised box placed on a webpage to indicate the user's proficiencies or preferences.
A graphic modelled after this, shared on various social media websites.

userboxes
plural of userbox

uvulotome
The surgical instrument used in uvulotomy.

uvulotomes
plural of uvulotome

vaginoscope
An endoscope used in vaginoscopy.

vaginoscopes
plural of vaginoscope

valvelet
A small valve.

valvelets
plural of valvelet

valvocopula
A copula (girdle) that runs around the valve of a diatom

valvocopulae
plural of valvocopula

valvula
A small valve.

valvule
A small valve.
A structure similar to a small valve.

valvules
plural of valvule

vanbulance
A compact ambulance in the form of a van.

vanbulances
plural of vanbulance

vanily
The community and friends of a nomadic van dweller on the road.

vanload
The load carried by a van.

vanloads
plural of vanload

vannet
A bearing representing a hingeless scallop shell.

vannets
plural of vannet

vao
A fairy chess piece which moves analogously to the xiangqi cannon and bishop, moving diagonally and must hop over a piece of either side to capture.

variocoupler
A kind of variometer (magnetic instrument) constructed with two coils of wire that are connected not to each other but to separate circuits, so as to function as an air core RF transformer with variable coupling.

variocouplers
plural of variocoupler

varitypist
The operator of a varitype machine.

varitypists
plural of varitypist

vasculopermeability
Vascular permeability (the permeability of blood vessel walls).

vaselet
A little vase.

vaselets
plural of vaselet

vasoattenuation
attenuation of blood vessels

vasocompression
External pressure applied to blood vessels

vasoconstriction
Constriction or narrowing of a blood vessel.

vasoconstrictions
plural of vasoconstriction

vasocontraction
Synonym of vasoconstriction.

vasocontractions
plural of vasocontraction

vasodegeneration
degeneration of blood vessels

vasodilatation
Dilatation of a blood vessel.

vasodilatations
plural of vasodilatation

vasodilation
Dilation or widening of the blood vessels.

vasodilations
plural of vasodilation

vasoligation
ligation of the vas deferens (or of a blood vessel)

vasoligations
plural of vasoligation

vasomotility
Synonym of vasomotion.

vasomotion
A spontaneous change in the diameter (caliber) of a blood vessel

vasomotions
plural of vasomotion

vasomotricity
Alternative form of vasomotion.

vasoobliteration
The obliteration of blood vessels

vasopermeation
vascular permeation, especially of blood vessels

vasoproliferation
proliferation within blood vessels

vasoproliferations
plural of vasoproliferation

vasoregression
regression of blood vessels

vasotransplantation
transplantation of a blood vessel

vasotransplantations
plural of vasotransplantation

vatje
A small cask for water; a military canteen

vatjes
plural of vatje

vehophobia
A fear of driving a vehicle.

veilleuse
A shaded night-lamp

veilleuses
plural of veilleuse

velology
The hobby of collecting vehicle tax discs.

velotaxi
pedicab, cycle rickshaw (cycle rickshaw used as taxi)

velotaxis
plural of velotaxi

venoocclusion
The obstruction of a blood vessel.

venoocclusions
plural of venoocclusion

ventrite
A ventral plate.

ventrites
plural of ventrite

ventrosity
pot-belliedness

vergeboard
A barge board.

vergeboards
plural of vergeboard

vergescu
The white shield that was the mark of novice knights, especially in Arthurian legend.

vergette
A small pale (vertical band down the middle of a shield).

vergettes
plural of vergette

verteporfin
A benzoporphyrin derivative used as a photosensitizer for photodynamic therapy to eliminate the abnormal blood vessels in the eye associated with conditions such as the wet form of macular degeneration.

verticillaster
A whorl of flowers apparently of one cluster, but composed of two opposite axillary cymes, as in mint.

verticillasters
plural of verticillaster

verticilli
plural of verticillus

verticillus
A whorl; a verticil.

vertisol
A clay soil, containing a high content of montmorillonite, that forms deep cracks in drier conditions.

vertisols
plural of vertisol

vetkoek
A deep-fried ball of dough, usually unsweetened, cut open and filled with various fillings.

vetkoeks
plural of vetkoek

vettura
A type of four-wheeled carriage, especially one let for hire

vetturas
plural of vettura

vetture
plural of vettura

vibrioplankton
Misspelling of virioplankton.

vibroactuator
A vibrational actuator

vibroactuators
plural of vibroactuator

vibroslice
A microtome that has a vibrating blade.

vibroslices
plural of vibroslice

victrola
Any upright or console model phonograph from the early 1900s, usually with a wooden cabinet body and an interior horn for the projection of sound, that plays 78 rpm records using a steel needle.

victrolas
plural of victrola

victrolla
Misspelling of victrola.

victrollas
plural of victrolla

videoduodenoscope
A duodenoscope equipped with a video camera

videoduodenoscopes
plural of videoduodenoscope

videoendoscope
An endoscope equipped with a video camera

videoendoscopes
plural of videoendoscope

videomicrometer
A micrometer equipped with a video camera

videomicrometers
plural of videomicrometer

videoscope
A borescope or endoscope fitted with a video camera

videoscopes
plural of videoscope

videostroboscope
A stroboscope used in videostroboscopy

videostroboscopes
plural of videostroboscope

videostroboscopies
plural of videostroboscopy

videostroboscopy
An endoscopic technique for visualising the vocal cord in motion.

vihuela
A guitar-like string instrument of 15th- and 16th-century Spain, usually with six courses or sets of strings (twelve strings in total).
A guitar-like string instrument of 19th-century Mexico with five strings, typically played in mariachi bands.

vihuelas
plural of vihuela

vireton
An arrow or bolt for a crossbow having feathers or brass placed at an angle with the shaft to make it spin in flight.

viretons
plural of vireton

virioplankton
Any planktonic (free-swimming) virus