eyecup
An eyebath.
Raccoon eyes.
A shield surrounding the eyepiece of a camera.
Alternative form of eye-cup or kylix.

eyedropper
A dropper for administering eyedrops.

eyedroppers
plural of eyedropper

eyedrops
plural of eyedrop

eyehole
The hole to which the viewer places his or her eye in a device such as a telescope.
The hole in a mask, helmet, or costume corresponding to the position of the eye, allowing the eye to look through it.
The hole in the face where the eye resides.

eyeholes
plural of eyehole

eyeletter
A machine for making eyelets.

eyeletters
plural of eyeletter.

eyeliner
Makeup used to outline the eye, generally applied along or close to the lashline.

eyeliners
plural of eyeliner

eyephone
A device that allows the wearer to watch video material as if immersed in the world being shown.

eyephones
plural of eyephone

eyescrew
Alternative form of screw eye.

eyescrews
plural of eyescrew; alternative form of screw eyes.

eyeserver
Alternative form of eye-server.

eyeservers
plural of eyeserver.

eyetracker
A device that tracks the movement of a subject's eyes when doing a specific task.

eyetrackers
plural of eyetracker

facebow
A prosthodontic instrument used to transfer functional and aesthetic components from the patient's mouth to the dental articulator.

facebows
plural of facebow

facebrick
Alternative form of face brick.

facebricks
plural of facebrick

facepaint
Paint used to decorate people's faces.

facepaints
plural of facepaint

faceplate
A removable protective shield separating the inner workings of a machine from operator and observer.
A rigid flat surface that has an active role in the interaction of a device with an operator or user.
A transparent window forming part of a helmet directly in front of the wearer's face, allowing them to see out.

faceplates
plural of faceplate

facereader
A device (or software) that can analyse facial expressions

facereaders
plural of facereader

facet
Any one of the flat surfaces cut into a gem.
One among many similar or related, yet still distinct things.
One of a series of things, such as steps in a project.
One member of a compound eye, as found in insects and crustaceans.
A smooth circumscribed surface.
Any of the small joints at each segment of the spine that provide stability and help guide motion
The narrow plane surface between flutings of a column; a fillet.
A face of codimension 1 of a polytope.
A criterion that can be used to sort and filter, such as the colour or size of products in an online store.

facets
plural of facet

facette
Dated form of facet.

facettes
plural of facette

factice
Vulcanized unsaturated vegetable or animal oil, used as a processing aid and property modifier in rubber.
An oversized, mock perfume bottle, usually filled with colored water instead of perfume, used for display purposes in perfumeries.

factices
plural of factice

factis
Alternative form of factice.

fadeometer
A device that measures the degree to which an ink sample will fade when exposed to light.

fadeometers
plural of fadeometer

faders
plural of fader

fadger
A glazier's frame.

fadolmidine
An adrenoceptor agonist used to treat spinal analgesia

fadometer
A device that irradiates materials in order to test the degree to which they fade from exposure to sunlight.

fadometers
plural of fadometer

fairlead
A device to guide a line, rope or cable around an object or out of the way, or to stop it from moving laterally.

fairleads
plural of fairlead

fairwater
A device that improves the streamlining of a vessel.

fairwaters
plural of fairwater

faldstool
A portable, folding chair used by a bishop when away from his throne.
Any similar stool used in a divine service (such as the coronation of a British monarch).

faldstools
plural of faldstool

fallout
The event of small airborne particles falling to the ground in significant quantities as a result of major industrial activity, volcano eruption, sandstorm, nuclear explosion, etc.
The particles themselves.
A negative side effect; an undesirable or unexpected consequence.
A declined offer in a sales transaction when acceptance was presumed.
The person who declines such an offer.
An impromptu guest used to fill in for another guest spot who is a no-show or who has cancelled last minute.

fallouts
plural of fallout

fanboys
plural of fanboy

fancymonger
A lovemonger; a whimsical lover.

fancymongers
plural of fancymonger

fanger
A receiver.
A helper; protector.

fangers
plural of fanger

fango
Mud from the thermal springs at Battaglia in Italy, used to treat certain medical complaints such as gout and rheumatism.

fangot
A unit formerly used for a bundle of silk, especially silk from Aleppo, of varying or unclear weight.

fangots
plural of fangot

fanion
A small flag used for marking positions, especially by soldiers and surveyors.

fanions
plural of fanion

fantasmascope
Synonym of phenakistoscope.

fantoccini
Puppets caused to enact dramatic scenes by means of machinery.
The puppet shows in which they are used.

fanware
software or collected media written by or for fans of something, e.g. tools for tracking sports statistics
Misspelling of fanwear.

fapkin
A napkin or tissue etc. used to catch and dispose of semen after masturbation.

fapkins
plural of fapkin

faradiser
Alternative form of faradizer.

faradisers
plural of faradiser

faradizer
A device that performs faradization.

faradizers
plural of faradizer

faravahar
A symbol of the religion Zoroastrianism, also used to represent the Iranian nation.

faravahars
plural of faravahar

fareway
A road, route, or passage used for travelling over or through.

fareways
plural of fareway

farfara
The dried leaves of coltsfoot (Tussilago farfara), formerly used to treat bronchitis.

farinograph
A device for measuring properties of flour mixed with water, such as its shear and viscosity.

farinographs
plural of farinograph

farinometer
An instrument for measuring the viscosity of flour.

farinometers
plural of farinometer

farmfield
A field used for farming purposes.

farmfields
plural of farmfield

farmscraper
A high-rise building used for growing crops or raising livestock.

farmscrapers
plural of farmscraper

fastener
Something or someone that fastens.
Something or someone that fastens.

fasteners
plural of fastener

fastloader
Synonym of turboload.

fastloaders
plural of fastloader

fatalities
plural of fatality

fatality
The state proceeding from destiny; invincible necessity, superior to, and independent of, free and rational control.
Tendency to death, destruction or danger, as if by decree of fate.
That which is decreed by fate or which is fatal; a fatal event.
Death.
An accident that causes death.
A person killed.
A move used to deliver a coup de grâce to a defeated opponent.

fathometer
A depth finder that uses sound waves to determine the depth of water.

fathometers
plural of fathometer

fatspo
Material created by and/or intended for fat people that promotes body positivity.
Material created and/or used to inspire weight loss by presenting fat people in a disparaging manner (associated with online communities encouraging eating disorders).

featherboard
A flat grooved piece of wood or other material used to hold the workpiece in position.

featherboards
plural of featherboard

featurephone
A telephone, especially a mobile phone, that has some advanced capabilities but is not as powerful as a smartphone.

featurephones
plural of featurephone

feechur
Eye dialect spelling of feature.
An undesirable or misimplemented feature (software or hardware capability).

feechurs
plural of feechur

feedhorn
A horn antenna used to convey electromagnetic waves between the transceiver and the reflector.

feedhorns
plural of feedhorn

feedreader
A software program that gathers content from newsfeeds.

feedreaders
plural of feedreader

feedscrew
Synonym of leadscrew.

felonwood
Synonym of felonwort (“Solanum dulcamara”).