| open sesame | |
| —n | |
| a very successful means of achieving a result | |
| [from the magical words used by Ali Baba in The Arabian Nights' Entertainments to open the door of the robbers' den] | |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |