noun

an extra piece of equipment for a system

noun

one of several small hard metal balls that are used between moving parts of a machine to help the parts move smoothly

noun

a part of a machine that holds a moving part

noun

a circular band that helps to turn or move something in a machine

noun

a part of a machine shaped like an open container, used for moving dirt, stones, etc.

noun

a small object that you press to make a machine start working or perform a particular action

noun

a part fixed to a wheel that makes something move backward and forward or up and down when the wheel turns

noun

a bar in an engine, fixed to a cam

noun

a moving part of a machine that supports another part

noun

an enclosed space, especially one inside a machine, a plant, or someone’s body

noun

a curved end on a tool or machine, used for pulling or picking things up

noun

a set of springs inside a toy or other object that make it work when you turn a handle or key

noun

a wheel in a machine that fits into the edge of another wheel or part and makes it turn

noun

a part of an object or machine that fits around something curved and protects it

noun

the part of an engine where the fuel is burned

noun

one of the different parts that a machine or piece of equipment consists of

noun

the part of a jet engine where air is put under extra pressure before it is sent into the combustion chamber to be mixed with fuel and burned

noun

an object attached to the end of a wire, used for connecting two pieces of equipment

noun

a part of a machine that controls a particular process

noun

a piece of equipment that turns to make something move or start

noun

a piece of equipment that automatically switches off a machine when something goes wrong

noun

the tube in an engine that a piston moves backward and forward in

noun

a round instrument on a machine that shows you the amount of something, for example heat or pressure

noun

a circular part of a machine such as a washing machine

noun

a piece of equipment that changes the movement of an engine or machine into electricity

noun

the part of a machine through which you put things into the machine

noun

the part of a machine through which you put things into the machine

noun

a heavy wheel in a machine or engine that keeps it operating at a steady speed

noun

a flat ring of rubber, metal, or plastic that you put between two surfaces in a pipe or machine so that liquid or gas cannot escape

noun

the part of an engine that changes engine power into movement. Most cars in the U.S. are automatics, so the engine changes between gears without the driver having to do anything

noun

a machine or part of a machine that does a particular job

noun

something that covers a dangerous part of a machine

noun

the most important parts of a system, plan, or machine

noun

a piece of equipment that carries heat from one place to another, for example in a fridge

noun

the hydraulic parts of a machine

noun

a tube through which a liquid or gas goes into a machine

noun

the working parts inside a machine or piece of equipment

noun

a set of instruments and controls that are used for operating a machine

noun

the part of a machine or engine where air or fuel is taken in

noun

a cover around a machine or piece of equipment that controls its temperature or prevents heat loss

noun

the parts of a machine that open and close, either to hold something or to pick something up and move it from one place to another place

noun

a connection between machines or electronic equipment

noun

a piece of equipment used for preventing someone from using a vehicle, machine, etc.

noun

the moving or working parts of a machine

noun

a machine or part of a machine

noun

a part of a machine such as a computer

noun

the part of a machine or vehicle that makes it work or move

noun

a part of a machine that moves when the machine is working

noun

the part at the bottom of an engine that holds the oil

noun

one of the smaller individual pieces that a machine or vehicle is made of

noun

a part that you push with your foot in order to operate a bicycle, vehicle, or machine

noun

a piece of equipment that reacts to light and is used in machines such as burglar alarms (=machines that make a loud noise if a thief tries to get into a building)

noun

a small metal wheel inside a machine that moves other wheels

noun

the part of an engine that moves up and down to create power

noun

a part of a machine or piece of equipment that you push down

noun

the part of an engine that keeps it from getting too hot

noun

a part of a machine that pushes something into a position by hitting it with a lot of force

noun

a part of a machine consisting of a wheel or bar with teeth on it. Another metal piece fits into it, allowing it to move in only one direction.

noun

a piece of equipment that controls the way that a machine works

noun

a remote control

noun

a system of controlling a piece of equipment from a short distance away

noun

a container, often part of a machine, where liquid is kept for a particular purpose

noun

a tube in a machine or piece of equipment that goes around and around in order to make something flat, or in order to crush, spread, or print something

noun

a shaped piece of something such as rubber that closes a hole inside a machine so that air or other substances cannot get in or out

noun

a metal bar in an engine that causes a part to move when another part moves

noun

a part of a large vehicle or machine used for digging or moving large amounts of dirt

noun

something that covers the lower part of a machine or a vehicle

noun

something that covers the lower part of something such as a machine

noun

a tube that surrounds and protects part of a machine

noun

a part of a machine into which a round part called a ball fits, so that it can move

noun

a part for a vehicle or machine that you can use to replace one that breaks

noun

a part of a machine that is shaped like a stick and has a wheel or other object spinning around it

noun

one of several parts on the outside of a wheel that fit into the holes in something such as a chain or a piece of film and pull or turn it when the wheel turns

noun

a part on a vehicle or machine that keeps it steady or in the correct position

noun

the part of a machine or engine that makes it start

noun

a motor that is part of a machine or engine and makes it start

noun

a piece of equipment that makes an engine more powerful by supplying air into the fuel at a faster rate than normal

noun

a piece of equipment that makes a machine start or stop working at a time that you have chosen

noun

one of a row of narrow pointed parts that form the edge of a tool or machine

noun

a part of a machine that you move up and down with your foot to make the machine work

noun

a piece of wire that is attached to something such as a gun or a camera and operates it when someone touches or pulls the wire

noun

a small machine that does a particular job by itself, or is a part of a larger machine

noun

the part of a machine or piece of equipment that opens and closes in order to control the flow of air or liquid

noun

a long flat blade designed to be moved by wind or water, especially in order to provide power for a machine

noun

a round part inside a machine that fits into another similar part and makes it turn

noun

the workings of something such as a system, organization, or piece of equipment are the parts that control it or make it work

noun