Involved in protecting something or

somebody sell-by date sel bai.deit/n the date

after which a product must not be

offered for sale semester /si'mest3(r) n one of the

two periods that the school or

college year is divided into semiconductor /_isemik3n'dAkt3(r)/ n

an electronic device such as a

transistor which formsthe basis of

all integrated circuits sensor senso(i) n a device used to

detect the presence of a particular

quality or effect such as heat, light,

sound,etc. setting 'sctiij n the position at which

a control is set

shock /Jbk/ n sudden violent

movement or contact with

something simulated /'simjaleitid/ad/'doneona

computer, in a way that creates real-life conditions simulation /.simjs'leij'n/ n a situation

in which real-life conditions are

created on a computer in orderto

study or experience something sketch s к с 11' (/to draw quickly and

simply without details smart /smci:t/ad/capable of

intelligent action; equipped with a

processor smoke detector /smauk di,tekt3(r)//7

a safety device which provides

warning of smoke software /'sDftwe3(r)/ n the programs

that control the operation of a

computer sound system /'sond ,sist3m/n

equipment for playing recorded or

live music and for making it louder sound-proofed /saondpru:fd/ad/

made so that sound cannot get out spray sprci vto force out liquid in

very small drops under pressure stick stik Vto attach something

firmly to something else using

adhesive storey st.Tri n a level or floor of a

building stressed /stresd/ adj subjected to a

force per unit area that tends to

change the dimensions of the

material stretch siivtJV vto make something

become wider or longer, for example

by pulling it structure str\kl|'r>(r)'n something

which is made upof many parts,

especially a building subject /'sAbdjckr n an area of study suction 's,\kj'n/ n the process of

removing air in order to create a

partial vacuum supervise su:povai/ vto be in

charge of something and make sure

that everything is done correctly supplies so'plai/ n the parts and

materials that a manufacturer

needs to make things support so'pn:t я a part or structure

that holds something firmly in

position; help that a company offers

to customers using its products tagging 'uegiij/na system where an

electronic device is attached to a

person in order to know where they

are at all times take-off tciknf n the beginning of a

flight, when a plane or spacecraft

rises from the ground technician tcknijn n a highly-skilled

scientific or industrial worker three-dimensional /Ori: dai'menjanl/

adjshowing length, breadth,and

height, giving a solid appearance throttle Orntl/ n a valve that controls

the flow of fuel to an engine thrust /Oiwst/r? the forward moving

power of an engine track /тек/ л any of the pieces of

music on a recording traffic /tnefik/ nthe movement of

vehicles along roads training treinin, я the process of

learning the skills needed to do a job trend trend n the general direction in

which something is changing or

developing trigger trk]o(r)' n a small metal lever

that you press withyourfingerto

fire a gun two-dimensional lu: dai'mcnj'onl/

007 showing only length and height

or breadth; represented on a flat

piece of paper two-stroke 'lu: straok'od/an engine

which requires two piston strokes

per crankshaft revolution ultrasound /'.\ltn>saond/ n high-frequency sound unique ju:ni:k ac//'theonlyoneofits

type; not like any other unmanned /..uiiruend/ad/ having no

people on board update \pdeit' vto get the most

recent version of something valve /v;elv n a device which controls

theflowof a fluid vary /veari/ vto be different from one

situation, model, etc. to the next

vertical '\:v.\\k\'adjstanding upright,

at 90° vibrate /vai'breit/vto move from side

to side very quickly and with small

movements virtual /v3:tj"o3l/ adj that exists only

in a computer, not in real life virus /'vairos/ n instructions hidden in

a computer program that are

designed to cause faults or destroy

data voice-operated /,vdis Dpareitid/adj

that can be made to work using only

spoken instructions wear /wea(r)/ n damaging effects of

ordinary use over a long period wear .\veo(r)/ vto damage something

by using it over a long period web page /'web рекЬ, п an individual

page of information on the Internet welding /weldirj/n the joining of like

materials by heat wirelesshotspot vvaialas liDtspot/n

a place, in a hotel or restaurant,etc.,

fitted with a special device that

enables you to connect a computer

to the Internet without using wires

OXPORD

UNIVERSITY PRESS

Great Clarendon Street, Oxford 0x2 6dp

Oxford University Press is a department of the University of Oxford.