dietetics
n. 营养学;饮食学
例句
This book makes a significant contribution to dietetics.
此书对营养学有很大贡献。
You have a bad diet habit and I don't think you know dietetics.
你的饮食习惯很差,我认为你对营养学一无所知。
If you mean the word that calculate the reference book that can buy this dietetics consults.
您假如想要算的话,可以买本营养学的工具书参考一下。