Welsh onion
noun
1- an Asian onion that forms clusters of slender bulbs which resemble salad (spring) onions. It is the onion most commonly used in SE Asia大葱, 葱。
1.1
- Allium fistulosum, family Liliaceae (or Alliaceae).拉丁名Allium fistulosum,百合科（或葱科）。
词源
early 18th cent. （as Welch onion）： Welsh from German welsch 'foreign'.