ultra-

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ultra- prefix repr. L. ultrā beyond, rel. to ULTERIOR, etc.; in mod. use (from early XIX) a living prefix
1. prepositionally, surpassing the limits of (the specified concept), as ultra-human;

2. adverbially, marked by an extreme degree of the quality denoted by the adj. qualified;

3. spec. in ultra-violet applied to the rays beyond the violet end of the visible spectrum;

4. denoting instruments recording very minute measurements, as ultramicroscope.

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