scallion Meaning, Definition & Usage

  1. noun plant having a large slender white bulb and flat overlapping dark green leaves; used in cooking; believed derived from the wild Allium ampeloprasum
    Allium porrum; leek.
  2. noun a young onion before the bulb has enlarged; eaten in salads
    green onion; spring onion.

WordNet

Scal"lion noun
Etymology
OF. escalone, escaloingne, L. caepa Ascalonius of Ascalon, fr. Ascalo Ascalon, a town in Palestine. Cf. Shallot.
Definitions
  1. (Bot.) A kind of small onion (Allium Ascalonicum), native of Palestine; the eschalot, or shallot.
  2. Any onion which does not "bottom out," but remains with a thick stem like a leek. Amer. Cyc.

Webster 1913