retarders
plural of retarder

rethreader
A device for repairing a damaged mechanical thread.

rethreaders
plural of rethreader

retinoscope
An instrument used for examining the refraction of light within the eye.

retinoscopes
plural of retinoscope

retoolers
plural of retooler

retoolings
plural of retooling

retoother
A machine that retooths.

retoothers
plural of retoother

retransmitter
Any device that retransmits a signal.

retransmitters
plural of retransmitter

retrocomputing
A hobby involving the collecting, maintenance, and use of obsolete computer equipment.

retronym
A new word or phrase coined for an old object or concept whose original name has become used for something else or is no longer unique, or which did not originally have a specific name.

retronyms
plural of retronym

retroreflectometer
A device used to measure the retroreflectivity of surfaces.

retroreflector
A retroreflective device or surface.

retroreflectors
plural of retroreflector

revefenacin
A bronchodilator used to treat chronic obstructive pulmonary disease.

reversine
A synthetic molecule, 2-(4-morpholinoanilino)-6-cyclohexylaminopurine, used for stem cell dedifferentiation.

revulsor
A device for applying heat and cold alternately for medical purposes.

revulsors
plural of revulsor

rewindings
plural of rewinding

rewriter
One who, or that which, rewrites.
Part of a compiler that makes a second pass to fix the generated object code by implementing postconditions, patching in calls or pointers to point to the correct locations, etc.

rewriters
plural of rewriter

rexine
A type of leather imitation, as used for things like book covers and upholstery.

rhedarium
A structure used for storage, sale, or manufacture of horse-drawn carriages.

rhedariums
plural of rhedarium

rheocrat
A kind of motor speed controller permitting gradual variation in speed, and reversal. It is especially suitable for use with motor-driven machine tools.

rheocrats
plural of rheocrat

rheoencephalograph
The recording device used in rheoencephalography.

rheoencephalographs
plural of rheoencephalograph

rheometer
A device used to measure the flow properties of fluids with variable viscosity.
A device used to measure the flow of electric current: an ammeter.
A flowmeter, especially for water or blood.

rheometers
plural of rheometer

rheomotor
A generator (apparatus that produces an electric current).

rheomotors
plural of rheomotor

rheoplethysmograph
An instrument for the measurement of variation in volume of organs by measurement of variations in electric impedance

rheoplethysmographs
plural of rheoplethysmograph

rheoscope
An instrument for detecting the presence or movement of currents, as of electricity.
Synonym of rheometer.

rheoscopes
plural of rheoscope

rheotan
An alloy of copper, nickel and zinc used for electrical resistors and heating coils.

rheotrauma
mechanical trauma, especially that caused to the lungs by mechanical ventilation

rheotrope
An instrument for reversing the direction of an electric current; synonym of commutator.

rheotropes
plural of rheotrope

rhinoscope
an instrument used to examine inside the nose

rhinoscopes
plural of rhinoscope

rhizocauls
plural of rhizocaul

rhizotron
A transparent underground structure, used to observe plant roots.

rhizotrone
Alternative form of rhizotron.

rhizotrones
plural of rhizotrone

rhizotrons
plural of rhizotron

rhob
Alternative form of rob (“inspissated juice of ripe fruit”).

rhyodacite
An extrusive volcanic rock intermediate in composition between dacite and rhyolite

rhysimeter
An instrument, similar to a pitot tube, for measuring the velocity of a fluid current, the speed of a ship, etc.

rhysimeters
plural of rhysimeter

rhythmometer
An instrument for marking time in music, e.g. a metronome.

rhythmometers
plural of rhythmometer

riatas
plural of riata

ribociclib
A kinase inhibitor used to treat certain cancers

ribolyser
A form of small ball mill used for the homogenization of biological samples

ribolysers
plural of ribolyser

riboprobe
A segment of RNA that is used to probe for a complementary sequence of nucleotides in a DNA or mRNA.

riboprobes
plural of riboprobe

ricer
A person, especially a Native American, who cultivates and harvests rice.
A utensil used to extrude soft foods (especially, cooked potato) through holes about the diameter of a grain of rice.
An automobile, especially one imported from an Oriental country, deemed inferior or cheap, that has been modified with after-market parts in order to appear more powerful or sporty.
A person who drives such an automobile.

ricers
plural of ricer

riem
Alternative form of reim.

riempie
A strip of worked leather, especially as used to form crisscrossed patterns on the back of chairs etc.

riempies
plural of riempie

riems
plural of riem

riffler
A mechanical device consisting of a metal box with a series of vertical slats through which material is poured and randomly divided into two samples; this process is repeated to obtain a small representative sample of a bulk material.
A curved file used in carving wood and marble.

rifflers
plural of riffler

rikkunshito
A Japanese traditional medicine made from various herbs and used for disorders of the gastrointestinal tract.

rimer
A tool for shaping the rimes of a ladder.
A rhymer; a versifier.

rimers
plural of rimer

rimshot
A percussive note in which the drumstick hits both the head and the rim of the drum.
A percussive sting or flourish used to punctuate a joke in a cabaret or vaudeville act.
A shot in which the ball hits the rim of the basket.

rimshots
plural of rimshot

ringe
A whisk made of heather.

ringheads
plural of ringhead

ringtone
The sound made by a telephone when ringing.
A customizable tone used to indicate an incoming call on a telephone, especially a mobile phone.

ringtones
plural of ringtone

rinser
One who, or that which, rinses.
A small additional kitchen sink beside the main sink, used for rinsing items.

rinsers
plural of rinser

riociguat
A drug that is a stimulator of soluble guanylate cyclase (sGC), used to treat pulmonary hypertension.

riometer
An instrument used to quantify the amount of electromagnetic wave ionospheric absorption in the atmosphere.

riometers
plural of riometer

ripeck
Alternative form of rypeck.

ripecks
plural of ripeck

ripener
Any chemical compound used to promote ripening.
Something that ripens.

ripeners
plural of ripener

ripoprobe
Misspelling of riboprobe.

risograph
A high-speed printing machine used for high-volume photocopying by means of an internal stencil.
A print produced by such a machine.

risographs
plural of risograph

roadometer
An odometer.

roadometers
plural of roadometer

roamings
plural of roaming

roanoke
White beads of low value made from shells, formerly used for ornaments and currency by Native Americans of colonial Virginia.

roans
plural of roan

roap
Obsolete form of rope.

roband
A ropeband.

robands
plural of roband

roberd
chaffinch; robinet

roberds
plural of roberd

robinet
The chaffinch, or roberd.
The European robin.

robinets
plural of robinet

robochef
A machine that prepares and dispenses meals.

robochefs
plural of robochef

robovac
robotic vacuum cleaner

robovacs
plural of robovac

rockbolt
A bolt used to anchor the surface of rock

rockbolts
plural of rockbolt

rocktronica
Synonym of electronic rock.

rockwheel
A toothed wheel used to excavate trenches.

rockwheels
plural of rockwheel

rodenticide
Any toxic substance used to kill rodent pests.

rodenticides
plural of rodenticide

roentgenizdat
Improvised gramophone recordings made from X-ray film, used to smuggle prohibited music into the Soviet Union.

roentgenometer
A device for measuring radiation.

roentgenometers
plural of roentgenometer

roffia
Obsolete form of raffia.

rofia
Obsolete form of raffia.

rohob
Alternative form of rob (“inspissated juice of ripe fruit”).