scal ‧ lion /ˈskæljən/ BrE AmE noun [countable] American English
[ Date: 1200-1300 ; Language: Anglo-French ; Origin: scalun , from Latin ascalonia (caepa) 'onion of Ascalon' , ancient port in Palestine ]
a type of young onion with a small round end and a long green stem SYN spring onion British English