sesame
Concise Oxford English Dictionary © 2008 Oxford University Press:
sesame /ˈsɛsəmi/
▶noun a tall annual herbaceous plant of tropical and subtropical areas of the Old World, cultivated for its oil-rich seeds. [Sesamum indicum.]
– phrases
open sesame a free or unrestricted means of admission or access. [from the magic formula in the tale of Ali Baba and the Forty Thieves.]
open sesame a free or unrestricted means of admission or access. [from the magic formula in the tale of Ali Baba and the Forty Thieves.]
– origin ME: via L. from Gk sēsamon, sēsamē; cf. Arab. simsim.
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