From Longman Dictionary of Contemporary Englishadaptera‧dapt‧er, adaptor /əˈdæptə $ -ər/ noun [countable] DTan object that you use to connect two different pieces of electrical equipment, or to connect two pieces of equipment to the same power supply
Examples from the Corpus
adapter• Fitting a 3.5 inch drive to a 5.25 inch bay requires an adapter that is suitable for the particular drive.• Circuit of the capacitance adapter Fig. 2.• You have to be an early adapter.• Wisely, my folks did kick in another $ 25 for an electrical adapter.• Video: Find a graphics adapter with at least 2 megabytes of video memory.• It runs well on all graphics adapter types and has no special hardware requirements.• The voltage is usually 220v and we recommend you take a universal plug adapter for electrical appliances.• For that, you need to buy a printer and a print adapter. 