Scallion

A scallion (UK: Spring Onion) is one of various Allium species, all of which have hollow green leaves (like the common onion), but which lack a fully developed root bulb. It has a relatively mild onion flavour, and is used as a vegetable, either raw or cooked. Many other names are used, including green onion, spring onion, salad onion, table onion, green shallot, onion stick, long onion, baby onion, precious onion, yard onion, gibbon, syboe or scally onion.