A flashcard is a commonly used type of memory card for digital cameras, a flashcard stores the images as they are taken by your digital camera. CompactFlash and SmartMedia are the two most commonly used types of flashcards.

magnetic card for digital cameras & portable devices

a card with words or numbers of pictures that are flashed to a class by the teacher

A card with words, sentences or pictures on it. A teacher can use these to explain a situation, tell a story, teach vocabulary etc.