'Scallion' definitions:

Definition of 'scallion'

From: WordNet
noun
Plant having a large slender white bulb and flat overlapping dark green leaves; used in cooking; believed derived from the wild Allium ampeloprasum [syn: leek, scallion, Allium porrum]
noun
A young onion before the bulb has enlarged; eaten in salads [syn: green onion, spring onion, scallion]

Definition of 'Scallion'

From: GCIDE
  • Scallion \Scal"lion\, n. [OF. escalone, eschaloingne, L. caepa Ascalonia onion of Ascalon; caepa onion + Ascalonius of Ascalon, fr. Ascalo Ascalon, a town in Palestine. Cf. Shallot.]
  • 1. (Bot.) A kind of small onion (Allium Ascalonicum), native of Palestine; the eschalot, or shallot. [1913 Webster]
  • 2. Any onion which does not "bottom out," but remains with a thick stem like a leek. --Amer. Cyc. [1913 Webster]