sesame

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An erect annual plant (Sesamum indicum) native to tropical Asia, widely cultivated for its small flat seeds.
• noun The seed of this plant, used as food and as a source of oil.

from The Century Dictionary.

• noun An annual herbaceous plant, Sesamum Indicum (S. orientale), widely cultivated and naturalized in tropical and subtropical countries.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) Either of two annual herbaceous plants of the genus Sesamum (S. Indicum, and S. orientale), from the seeds of which an oil is expressed; also, the small obovate, flattish seeds of these plants, sometimes used as food. See benne.
• noun the magical command which opened the door of the robber's den in the Arabian Nights' tale of “The Forty Thieves;” hence, a magical password.
• noun (Bot.) Same as Gama grass.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A tropical Asian plant Sesamum indicum bearing small flat seeds used as food and as a source of oil
• noun The seed of this plant

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun East Indian annual erect herb; source of sesame seed or benniseed and sesame oil