Definition
"Allium cepa" is the scientific name for the common onion. It identifies the species in the biological classification system. This name ensures that scientists worldwide know exactly which plant is being discussed, avoiding confusion caused by common names. Think of it like a character's full name versus their nickname. Unlike a casual label, "Allium cepa" provides precision. It distinguishes the culinary onion from other alliums, like garlic. It's used in research, agriculture, and botany.