sesame

sesame
/ˈsesəmɪ; `sɛsəmɪ/ n
1 [U] tropical plant with seeds which are used as food and which give an oil used in salads and in cooking 芝麻; 脂麻; 胡麻
    [attrib 作定语]
sesame seeds, oil 芝麻种子、 芝麻油.
2 (idm 习语) open sesame => open1.

牛津英汉双解词典