felonwort
Bittersweet nightshade (Solanum dulcamara).
Other plants traditionally used to treat the type of bacterial infection known as a felon, such as celandine.

femboi
Alternative form of femboy (often used for filter avoidance).

fembois
plural of femboi

femtomachine
A (hypothetical or fictional) machine on the femto scale; that is, a mechanical device whose size is on the order of the femtometer.

femtomachines
plural of femtomachine

femtometer
US spelling of femtometre.

femtometers
plural of femtometer

fenfluramine
An appetite suppressant used to treat obesity

fenfluramines
plural of fenfluramine

feng
The Latin-script letter ʩ, used to transcribe a voiceless velopharyngeal fricative in the context of disordered speech.

fengs
plural of feng

fenoprop
2-(2,4,5-trichlorophenoxy)propionic acid, a herbicide formerly used to control woody plants and broadleaf weeds.

fenprocoumon
Alternative form of phenprocoumon.

fenpropimorph
A morpholine fungicide used to control diseases in cereals

feprazone
A certain drug used for joint and muscular pain.

ferie
A holiday.

feries
plural of ferie

feroher
Archaic spelling of faravahar.

ferohers
plural of feroher

ferretings
plural of ferreting

ferretto
copper sulphide, used to colour glass.

ferriprotoporphyrin
A reddish-brown crystalline material, haematin hydrochloride, obtained by treatment of dried blood with salt and acetic acid, that was once used to detect traces of blood.

ferriprotoporphyrins
plural of ferriprotoporphyrin

ferrite
The interstitial solid solution of carbon in body-centered cubic iron.
Any of a class of metal oxides which show ferrimagnetism; used in transformers, inductors, antennas, recording heads, microwave devices, motors and loudspeakers.
The anion FeO₂²⁻, and any of the salts (formally derived from the unknown ferrous acid) derived from it.

ferrites
plural of ferrite

ferrocholinate
A chelate prepared from ferric chloride and choline citrate; used to treat iron deficiency

ferrometer
A device for estimating the proportion of iron in the blood.
A water purifier employing ferrous sulphate.

ferrometers
plural of ferrometer

fertiliser
Alternative spelling of fertilizer.

fertilisers
plural of fertiliser

fertilizer
A natural substance that is used to make the ground more suitable for growing plants.
A chemical compound created to have the same effect.
Human remains, especially obscured or to be forgotten.

fertilizers
plural of fertilizer

festues
plural of festue

fetoscope
A flexible fibreoptic device used to view a foetus in the womb.
A form of stethoscope for listening to the foetal heartbeat.

fetoscopes
plural of fetoscope

fettlings
plural of fettling

fi
The solfeggio syllable used to indicate the sharp of the fourth note of a major scale.

fiberizer
A machine that fiberizes.

fiberizers
plural of fiberizer

fiberscope
a flexible fibreoptic device for viewing otherwise inaccessible areas

fiberscopes
plural of fiberscope

fibrescope
An instrument, consisting of a fibre optic bundle, used to observe inaccessible areas

fibrescopes
plural of fibrescope

fibroscope
Alternative form of fibrescope.

fibroscopes
plural of fibroscope

fictive
Having the characteristics of fiction: fictional.
Resulting from imaginative creation: fanciful or invented.
Being feigned, ingenuine or unreal.

fictives
plural of fictive

ficusin
psoralen

fiddlebow
A bow used to play the fiddle.

fiddlebows
plural of fiddlebow

fidibus
A piece of paper used for lighting a pipe, etc.

fidibuses
plural of fidibus

fiducial
Accepted as a fixed basis of reference.
Based on having trust.

fiducials
plural of fiducial

fieldbus
A member of a family of industrial digital communication networks used for real-time distributed control.

fieldbuses
plural of fieldbus

fieldmeter
An instrument for measuring the magnetic field.

fieldmeters
plural of fieldmeter

fieldstone
A stone found in fields and used for building.

fieldstones
plural of fieldstone

fifi
An improvised vagina substitute used for masturbation.

fifis
plural of fifi

figleaf
Alternative spelling of fig leaf.

figleaves
plural of figleaf

filatories
plural of filatory

filatory
A machine for forming threads.

filehandle
Alternative spelling of file handle.

filehandles
plural of filehandle

filemaker
A manufacturer of files (rasping tools).

filemakers
plural of filemaker

filemaking
The manufacture of files (rasping tools).

fileserver
A server used to share files with other computers.

fileservers
plural of fileserver

filesmith
A maker of files (rasping tools).

filesmiths
plural of filesmith

filesystem
Alternative form of file system.

filesystems
plural of filesystem

filgrastim
A granulocyte colony-stimulating factor (G-CSF) analogue used to stimulate the proliferation and differentiation of granulocytes.

filipod
Synonym of filipodium.

filipodia
plural of filipodium

filipodium
A hairlike projection, especially in parts of the brain, or as used for locomotion by some amoebas

filipods
plural of filipod

fillings
plural of filling

fillipeen
Alternative form of philopena.

fillipeens
plural of fillipeen

filter
A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.
Electronics or software that separates unwanted signals (for example noise) from wanted signals or that attenuates selected frequencies.
Any item, mechanism, device, or procedure that acts to separate or isolate.
Self-restraint in speech.
A non-empty upper set (of a partially ordered set) which is closed under binary infima (a.k.a. meets).
A translucent object placed in the light path of a camera to remove certain wavelengths (colors), or a computer program that simulates such an effect.
An appearance-altering digital image effect.

filterbank
Alternative spelling of filter bank.

filterbanks
plural of filterbank

filterbed
Alternative form of filter bed.

filterbeds
plural of filterbed

filtercake
Alternative form of filter cake.

filtercakes
plural of filtercake

filtercard
Alternative form of filter card.

filtercards
plural of filtercard

filtercube
A device, attached to a microscope, that allows a variety of filters to be selected

filtercubes
plural of filtercube

filtered
With a filter (e.g., a cigarette).
Having been filtered (e.g., coffee grounds).

filterpad
Alternative form of filter pad.

filterpads
plural of filterpad

filterpaper
Alternative form of filter paper.

filterpapers
plural of filterpaper

filters
plural of filter

filterwheel
A device, attached to a microscope, that allows a variety of filters to be selected

filterwheels
plural of filterwheel

filthmonger
A purveyor of filth or obscenity.

filthmongers
plural of filthmonger

filtrator
Synonym of filter feeder.

filtrators
plural of filtrator

finderscope
A small telescope, or other sighting device, mounted on top of a main telescope to enable approximate directional positioning.

finderscopes
plural of finderscope

findings
plural of finding

fineliner
A felt-tip pen with a thin tip, usually used for sketching or drawing.

fineliners
plural of fineliner

fingerguard
Any device or mechanism designed to prevent the fingers becoming trapped or injured, as in a closing door or a machine.

fingerguards
plural of fingerguard

firagana
Archaic form of hiragana.

firebucket
Alternative spelling of fire bucket.

firebuckets
plural of firebucket

fireclay
Alternative spelling of fire clay.

fireclays
plural of fireclay

firefan
handheld fan used for fanning a fire

firefans
plural of firefan

firegrate
Alternative form of fire grate.

firegrates
plural of firegrate

firehook
a long pole with a hook at the end, used to pull down buildings and roof thatch to suppress a fire.

firehooks
plural of firehook

firelighter
A small block of a flammable substance, typically a combination of sawdust and wax, used to light fires.

firelighters
plural of firelighter

firepersons
plural of fireperson