factorion
A number that is equal to the sum of the factorials of its digits.

factorions
plural of factorion

factum
Somebody's own act and deed.
Somebody's own act and deed.
Somebody's own act and deed.
Somebody's own act and deed.
A product (result of multiplying two numbers).

factums
plural of factum

fadoodle
nonsense

fadoodles
plural of fadoodle

fafillion
An indefinitely large number.

fafillions
plural of fafillion

falness
Obsolete form of fullness.

falt
An old English measure of wheat in London containing 9 bushels.

faltche
A Moldavian unit of measure for area.

faltches
plural of faltche.

falts
plural of falt

fanback
A kind of chair whose back has a number of vertical elements that spread out like a fan.

fanbacks
plural of fanback

fanega
A traditional Spanish unit of dry measure, chiefly used for grain and roughly equivalent to a bushel.
A traditional Spanish unit of area, vaguely reckoned as the amount of farmland able to be sown with a fanega of seed.
A traditional Spanish unit of area, formalized as equivalent to about 6440 m².

fanegada
Synonym of fanega (“traditional Spanish unit of volume, mass, or land area”).

fanegadas
plural of fanegada

fanegas
plural of fanega

fanga
A traditional Portuguese dry measure, equal to about 50–75 liters at different places and times.

fangas
plural of fanga

fangfuls
plural of fangful

faraday
The quantity of electricity required to deposit or liberate 1 gram equivalent weight of a substance during electrolysis; approximately −96,487 coulombs.

faradays
plural of faraday

farasola
A unit of weight formerly used in trade in the Indian seas, varying from about 20 to 30 pounds.

farasolas
plural of farasola

farden
Pronunciation spelling of farthing.

fardens
plural of farden

fardingdeal
Obsolete form of farthingdale.

fardingdeals
plural of fardingdeal

farsang
A Persian measure of distance, equivalent to about four miles.

farsangs
plural of farsang

fartbreaths
plural of fartbreath

farthing
A quarter of any monetary unit or measure.
Former British unit of currency worth one-quarter of an old penny; or a coin representing this.
A very small quantity or value; the least possible amount.
A division of land.

farthingdale
A unit of area equal to one quarter of an acre.

farthingdales
plural of farthingdale

farthingdeal
Alternative form of farthingdale.

farthingdeals
plural of farthingdeal

farthingland
An old Scots unit of measure of land.

farthinglands
plural of farthingland

farthings
plural of farthing

farthingsworth
The amount that can be bought for a farthing.

farthingsworths
plural of farthingsworth

fartometer
A supposed device that measures flatulence.

fartometers
plural of fartometer

fasci
plural of fascio

fascicle
A bundle or cluster.
A bundle of skeletal muscle fibers surrounded by connective tissue.
A cluster of flowers or leaves, such as the bundles of the thin leaves (or needles) of pines.
A discrete bundle of vascular tissue.
A discrete section of a book issued or published separately, generally as a temporary measure while the work is in progress.

fascicles
plural of fascicle

fascio
A bundle or sheaf.
An organised Italian political group, typically one resisting state government and advocating radical change; (specifically) any of a number of groups formed around the period of the First World War.

fascios
plural of fascio

fasicle
Misspelling of fascicle.

fathomage
The amount of money paid to a miner based on fathoms of material worked.

fathomages
plural of fathomage

fatware
Bloatware.

fauj
Army.

fauvette
Any of a number of small songbird, such as nightingales or warblers.

fauvettes
plural of fauvette

featherbush
Any of a number of evergreen shrubs of the genus Aulax.

featherbushes
plural of featherbush

fecundicity
Alternative form of fecundity.

fecundities
plural of fecundity

fecundity
Ability to produce offspring.
Ability to cause growth or increase.
Number, rate, or capacity of offspring production.
Rate of production of young by a female.

fedan
A measure of land used in Sudan and Egypt, slightly more than an English acre. One fedan is about 4200 square meters.

fedans
plural of fedan

feetage
Synonym of footage (“measurement in feet”).

feetages
plural of feetage

feetful
plural of footful

feldscher
In Russia, one with practical but not formal medical training.
A physician assistant in a number of European and Central Asian countries (nowadays mainly former USSR countries).

feldschers
plural of feldscher

feldsher
Alternative form of feldscher.

feldshers
plural of feldsher

femtobarn
A unit of area equal to a billionth of a millionth (10⁻¹⁵) of a barn

femtobarns
plural of femtobarn

femtobecquerel
An SI unit of radioactive activity equal to 10⁻¹⁵ becquerels. Symbol: f

femtobecquerels
plural of femtobecquerel

femtobel
An SI unit of relative power equal to 10⁻¹⁵ bels. Symbol: f

femtobels
plural of femtobel

femtocandela
An SI unit of luminous intensity equal to 10⁻¹⁵ candelas. Symbol: fcd

femtocandelas
plural of femtocandela

femtocoulomb
An SI unit of electric charge equal to 10⁻¹⁵ coulombs. Symbol: f

femtocoulombs
plural of femtocoulomb

femtoelectronvolt
A unit of energy equal to one quadrillionth of an electronvolt, symbol feV

femtoelectronvolts
plural of femtoelectronvolt

femtofarad
An SI unit of electrical capacitance equal to 10⁻¹⁵ farads. Symbol: fF

femtofarads
plural of femtofarad

femtogram
An SI unit of mass equal to 10⁻¹⁵ grams. Symbol: fg

femtogramme
Alternative spelling of femtogram.

femtogrammes
plural of femtogramme

femtograms
plural of femtogram

femtoinjection
injection of femtogram amounts, typically into individual cells

femtoinjections
plural of femtoinjection

femtojoule
An SI unit of energy, work, and heat equal to 10⁻¹⁵ joules. Symbol: fJ

femtojoules
plural of femtojoule

femtokatal
An SI unit of catalytic activity equal to 10⁻¹⁵ katals. Symbol: f

femtokatals
plural of femtokatal

femtoliter
A unit of volume equal to 10⁻¹⁵ liters

femtoliters
plural of femtoliter

femtolitre
A unit of volume equal to 10⁻¹⁵ litres

femtolitres
plural of femtolitre

femtometre
An SI unit of length equal to 10⁻¹⁵ metres. Symbol: fm

femtometres
plural of femtometre

femtosecond
An SI unit of time equal to 10⁻¹⁵ seconds. Symbol: fs

femtoseconds
plural of femtosecond

ferding
A measure of land mentioned in Domesday Book, supposed to have consisted of a few acres.

ferdings
plural of ferding

fermium
A transuranic chemical element (symbol Fm) with an atomic number of 100.

ferrado
A traditional Galician unit of dry measure, equivalent to about 12–18 L depending on the substance measured.
A trapezoidal measuring cup once used for measuring ferrados of grain.
A traditional Galician unit of mass equal to the amount held by a ferrado, varying from about 12–20 kg depending on the substance measured.
A traditional Galician unit of land area reckoned as the amount needed to sow a ferrado of seed, varying from 64–725 m² in different parts of Galicia.

ferrados
plural of ferrado

ferroaluminium
A ferroalloy of iron and aluminium.

ferroaluminum
Alternative form of ferroaluminium.

ferromagnesium
A ferroalloy of iron and magnesium.

ferrouranium
A ferroalloy of iron and uranium.

fertilities
plural of fertility

fertility
The condition, or the degree, of being fertile.
The birthrate of a population; the number of live births per 1000 people per year.
The average number of births per woman within a population.

feynmanium
The hypothetical chemical element with atomic number 137.

fieldful
A quantity that fills a field.

fieldfuls
plural of fieldful

fieldsful
plural of fieldful

fifteenpence
The monetary amount of fifteen pence.

fillrate
A performance metric measuring the number of units fulfilled as a percentage of the total ordered.
A measurement of the number of pixels a video card can render in a certain time period.

fillrates
plural of fillrate

filmfest
An event at which a number of films are shown.

filmfests
plural of filmfest