■ noun an Asian onion that forms clusters of slender bulbs which resemble spring onions. [ Allium fistulosum .]
Origin
C18 (as Welch onion ): Welsh from Ger. welsch 'foreign'.
WELSH ONION
Meaning of WELSH ONION in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004