What is the name of the Nintendo Switch game-card format used by physical games?

Physical Nintendo Switch games use a format called the Nintendo Switch game card.

The game card is a small solid-state card inserted into the console's game-card slot. It replaced the optical discs used by Nintendo's Wii and Wii U home consoles, making it suitable for a system that also operates as a portable device. Its compact size avoids the moving parts and power demands associated with disc drives.

Nintendo Switch game cards can contain the game software, although some releases still require downloads or additional data. Publishers may also ship cards that hold only part of a game, with the rest downloaded from the internet. This is why a physical box does not always mean every byte is present on the card.

The cards are not ordinary SD cards and cannot be used as general storage. Nintendo also applies a bitter coating to discourage children from putting them in their mouths.