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adat
adaxial
ADC
ADC loan
ADD
add
add.
add-in
add-on
add-on method
add-on service
add up
add up to
adda
addax
added
added value
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add-on
add-on (plural add-ons) or add-in (plural add-ins)


noun 
Definition:
 
extra equipment: a piece of computer equipment added to another to expand its capabilities
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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