maigre
/ˈmeɪgə(r)/adjective
1- (in the Roman Catholic Church) denoting a day on which abstinence from meat is ordered（罗马天主教）斋日的。
1.1
- (of food) suitable for eating on maigre days（食物）斋日食用的, 素的。
词源
late 17th cent.: from French， literally 'lean'.