While many sushi rolls do feature raw fish, it's not part of the definition of sushi and you can order rolls without it — but if you order sashimi, you’ll always get raw fish. Many people may be unsure which to order, so it’s important to learn the definition before going to a sushi restaurant.

The term sushi comes from a combination of the Japanese words "su" and "meshi," which translate to vinegar and rice, as sushi rice is made sticky with vinegar so it can be made into wraps or balls. Sashimi, on the other hand, translates to "pierced body," and consists entirely of thinly-sliced raw meat.

When you see sashimi on the menu, it may be in a separate category from the sushi rolls, and often listed by the type of fish being served. Even though sashimi doesn't qualify as sushi because it doesn't contain any rice, you'll still hear it colloquially referred to as sushi.