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Definition from Dictionary, a free dictionary
Every revolutionary idea seems to evoke three stages of reaction. They may be summed up by the phrases: (1) It's completely impossible. (2) It's possible, but it's not worth doing. (3) I said it was a good idea all along.Arthur C. Clarke
- (uncountable) A medical ultrasound technique, used, for example, during pregnancy, providing three-dimensional-looking flat images.
- (countable) An image so produced.
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