| ultrasonics |
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noun
- the science and technology of ultrasound
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|
| ultrasound |
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noun
- sound with a frequency greater than the upper limit of human hearing; approximately 20 kilohertz
- (medicine) The use of ultrasonic waves for diagnostic or therapeutic purposes
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| ultraviolet |
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adjective (pos=ultra-, ultraviolet)
- of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre
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| updraft |
|
noun
- an upward current of air, especially a strong one
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| up quark |
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noun - (particles) A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV?. Symbol: u
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| upsilon |
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noun
- The twentieth letter of the Classical Greek, Classical and Modern Greek, the twenty-first letter of Old Greek, Old and Ancient Greek, Ancient.
- Letter of the Greek alphabet: '''Υ �
Previous: tau, Τ
Next: phi, Φ
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| USW |
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initialism - United Steelworkers
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| UV |
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initialism - ultraviolet
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