Olestra
/ɒˈlestrə/noun
mass noun
- trademark a synthetic compound used as a calorie-free substitute for fat in various foods because of its ability to pass through the body without being absorbed. It is a polyester derived from sucrose.〈商标〉奥莱斯特拉人造油脂（无卡路里, 通过人体时不会被吸收, 是一种取自蔗糖的聚酯）。
词源
1980s: from （p）ol（y）est（e）r + the suffix -a.