SD card
noun
A type of memory card typically used in digital cameras and other portable devices: most digicams today store photos on SD cards...
- The SD card is small enough for emerging devices like wristwatch MP3 players.
- They should be around the same price as current SD cards.
- Be sure your SD card can handle the amount of information you are trying to put on it.
Origin
1990s: abbreviated form of secure digital card.