1
- of or relating to diets or dieting（有关）饮食的：
dietary advice for healthy skin and hair.
有关保持健康皮肤和头发的饮食建议。
1.1
- provided by one's diet饮食中的：
the average dietary calcium intake was 140 milligrams per day.
饮食中钙的平均摄入量是每天140毫克。
词源
late Middle English (as a noun)： from medieval Latin dietarium, from Latin diaeta （see DIET1）.