Citric describes anything related to citrus fruits like lemons, oranges, limes, and grapefruits. When you bite into a lemon and taste that sharp, sour tang, you're experiencing citric acid, a natural chemical compound that gives these fruits their distinctive flavor.

Scientists use citric acid for all sorts of purposes beyond flavoring. It helps preserve food, clean surfaces, and even plays a role in how your body converts food into energy. When you see “citric acid” listed on a candy wrapper or soft drink label, manufacturers have added it to create that tart, refreshing taste.

So when something tastes citric, it has that bright, puckering sourness you associate with lemonade on a hot day. Citric acid doesn't just appear in citrus fruits. It also occurs naturally in berries, tomatoes, and even in your own cells, though it's most concentrated and noticeable in lemons and limes.