may ‧ on ‧ naise /ˌmeɪəˈneɪz $ ˈmeɪəneɪz/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: French ; Origin: perhaps from mahonnais 'of Mahón' , from Mahón port in Minorca ]
a thick white sauce, made of raw egg ↑ yolk s and oil, often eaten on sandwiches or ↑ salad