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Definition of SD card noun from the Oxford Advanced Learner's Dictionary

 

SD card

 noun
noun
BrE BrE//ˌes ˈdiː kɑːd//
 
; NAmE NAmE//ˌes ˈdiː kɑːrd//
 
 
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the abbreviation for secure digital card (= a type of memory card, used with digital cameras, mobile/cell phones, music players, etc.)
See the Oxford Advanced American Dictionary entry: SD card