role
A character or part played by a performer or actor.
The expected behaviour of an individual in a society.
The function or position of something.
Designation that denotes an associated set of responsibilities, knowledge, skills, or privileges
The function of a word in a phrase.
In the Raku programming language, a code element akin to an interface, used for composition of classes without adding to their inheritance chain.

roles
plural of role

rollator
A walking frame equipped with wheels, especially one designed for the disabled or elderly.

rollerdrum
A rolling drum used to culture cells

rollerdrums
plural of rollerdrum

rolleron
An aerodynamic control surface device, used to control against unwanted rolling (rotation) about the axis of movement. The moving wingtip is self-gyro-stabilized with a rolling bladed wheel catching the airstream, providing the gyroscopic moment.

rollerons
plural of rolleron

rollerskate
Alternative spelling of roller skate.

rollway
An inclined slope or chute prepared for rolling logs into a stream or into a mill.
A series of cylindrical metal rolls placed between two rails and spaced apart, used to convey materials along a production line.

rollways
plural of rollway

rolodex
Alternative form of Rolodex.

rolodexes
plural of rolodex

rom
Abbreviation of roman.

romal
A long quirt attached to the end of a set of closed reins that are connected to the bridle of a horse, and used to assist in moving cattle.

romall
Alternative form of romal (“Indian handkerchief”).

romalls
plural of romall

romals
plural of romal

romancists
plural of romancist

romaul
Alternative form of romal (“Indian handkerchief”).

romauls
plural of romaul

rondeau
A fixed form of verse based on two rhyme sounds and consisting usually of 13 lines in three stanzas with the opening words of the first line of the first stanza used as an independent refrain after the second and third stanzas.
A monophonic song with a two-part refrain.
Synonym of rondeau pan; a shallow pot or pan that can be used for braising.

rondeaus
plural of rondeau

rondeaux
plural of rondeau

rondle
A rondeau.
A round mass, plate, or disk, especially the crust or scale that forms upon the surface of molten metal in the crucible.
A round or rung; a step of a ladder.

rondles
plural of rondle

rongeur
An instrument with a sharp-edged, scoop-shaped tip, for gouging out bone.

rongeurs
plural of rongeur

roofage
Roofing; material used to make a roof, or the roof itself.

roofages
plural of roofage

roofbolter
A machine for installing roofbolts.

roofbolters
plural of roofbolter

roomaul
Alternative form of romal (“Indian handkerchief”).

roomauls
plural of roomaul

rootkit
A set of software tools used by a third party to gain unauthorized access to a computer system and control the system while concealing itself from the user.

rootkits
plural of rootkit

ropeband
A small piece of rope, used to fasten the head of the sail to the spar.

ropebands
plural of ropeband

ropeline
A line of rope with the purpose of moving people or goods from one location to another.
A line of rope that is used for climbing.
A rope barrier used to separate a crowd from a celebrity or politician.

ropelines
plural of ropeline

ropework
The making, repairing, knotting, splicing and storing of rope, and the manufacture of devices from rope, mostly by use of the marlinspike.
A form of raised convex or painted decoration in the form of twisted rope applied to architecture, ceramics, metalwork and furniture.

ropeworks
plural of ropework

rosaries
plural of rosary

rosary
Prayer beads, a string of beads used to keep track of repetitions in prayer, particularly of the Roman Catholic Marian prayer "Hail Mary" (Ave Maria).
A Roman Catholic devotion involving the repetition of a series of Marian prayers, usually 5, 15, or 20 decades of "Hail Marys", each decade beginning with "Our Father" and ending with "Glory Be to the Father", but sometimes including other Roman Catholic, Anglican, or Lutheran prayers.
A series or collection of thoughts, literary pieces, etc. intended for similar contemplation.
A 13th-century coin minted in Europe as a counterfeit debased form of the sterling silver penny of Edward I, at first accepted as a halfpenny and then outlawed.
A rose garden.

rosinback
A horse used for bareback riding performances.

rosinbacks
plural of rosinback

rosticceria
An Italian rotisserie (cooking device).
An Italian rotisserie (type of shop or restaurant).

rosticcerias
plural of rosticceria

rotablator
A device used in rotablation

rotablators
plural of rotablator

rotaevaporator
Alternative form of rotoevaporator.

rotaevaporators
plural of rotaevaporator

rotameter
A device used to measure fluid flow, in which a float rises in a tapered vertical tube to a height dependent on the rate of flow through the tube

rotameters
plural of rotameter

rotan
A long rattan cane used for corporal punishment.

rotans
plural of rotan

rotavator
A machine with rotating blades designed to break up or till soil.

rotavators
plural of rotavator

rotigotine
The dopamine agonist (S)-6-[propyl(2-thiophen-2-ylethyl)amino]-5,6,7,8- tetrahydronaphthalen-1-ol, used to treat Parkinson's disease and restless legs syndrome.

rotoevaporator
Abbreviation of rotary evaporator.

rotoevaporators
plural of rotoevaporator

rotometer
Alternative form of rotameter.

rotometers
plural of rotometer

rotomoldings
plural of rotomolding

rotovator
Alternative form of rotavator.

rotovators
plural of rotovator

roughcast
A crude model.
A rough surface finish, as of a plaster or stucco wall.
A mixture of pebbles or similar material used to finish a plaster or concrete wall.

roughcasts
plural of roughcast

roughometer
A device that is attached to a motor vehicle in order to measure the roughness of a road surface.

roughometers
plural of roughometer

roundabout
Indirect, circuitous, or circumlocutionary.
Encircling; enveloping; comprehensive.

roundabouts
plural of roundabout

roundstone
Small stones used for paving.

router
Someone who routes or directs items from one location to another.
Any device that directs packets of information using the equivalent of Open Systems Interconnection layer 3 (network layer) information. Most commonly used in reference to Internet Protocol routers.
A device that connects local area networks to form a larger internet by, at minimum, selectively passing those datagrams having a destination IP address to the network which is able to deliver them to their destination; a network gateway.
In integrated circuit or printed circuit board design, an algorithm for adding all wires needed to properly connect all of the placed components while obeying all design rules.

routers
plural of router

routine
A course of action to be followed regularly; a standard procedure.
A set of normal procedures, often performed mechanically.
A set piece of an entertainer's act.
A performance, execution of gymnastics for one of the apparatus.
A set of instructions designed to perform a specific task; a subroutine.

routiner
A jazz musician who plays by ear (i.e. not using sheet music, but rather following along with the band and memorizing music when needed).
A device used to automatically activate and cycle the settings of electronic equipment for testing purposes.

routiners
plural of routiner

routines
plural of routine

roux
A mixture of fat (usually butter) and flour used to thicken sauces and stews.

roxindole
A dopaminergic and serotonergic drug once used to treat schizophrenia

rpm
Alternative letter-case form of RPM.

rpms
plural of rpm

rta
The Vedic principle of natural order that regulates the operation of the universe.

ruddle
A form of red ochre sometimes used to mark sheep.
Ruddiness; red coloration.

ruddles
third-person singular simple present indicative of ruddle