柯林斯詞典sebum /?si?b?m/ 1. N-UNCOUNT Sebum is an oily substance produced by glands in your skin. 皮脂 返回 sebum劍橋詞典an oil-like substance produced by the sebaceous glands in the skin that makes hair shiny and prevents skin from becoming dry 皮脂（皮膚上的皮脂腺産生的一種油性物質(zhì)，可使頭發(fā)光澤，預防皮膚變乾） 返回 sebum