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| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| Bernoulli effect
The phenomenon of falling pressure in a fluid as the velocity of the fluid stream increases. The Bernoulli effect accounts for the lift generated by the airfoil shape of an airplane wing. See also Bernoulli's law, lift. See Note at aerodynamics. |