flashcard
"Flashcard" is a straightforward word with one core meaning, though it appears in a couple of useful contexts worth knowing about.
A flashcard is a small card that has a question, word, or fact on one side, and the answer or explanation on the other side. You use it to test your memory — you look at one side, try to remember the answer, then flip it over to check. Think of it as a mini quiz you can hold in your hand.
education, studying · Modern, widely used
A flashcard can also be a digital version of the same idea — an on-screen card in an app or website that works exactly like a physical flashcard. You see a question or word, think of the answer, then tap or click to reveal it. Apps like Anki or Quizlet are popular tools for this.
education, technology · Modern, widely used