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ultrashort
ultrasonic
ultrasonic testing
ultrasonic welding
ultrasonics
ultrasonogram
ultrasonography
ultrasound
ultrastructure
ultraviolet
ultraviolet astronomy
ultraviolet-visible spectroscopy
ultravirus
ulu
ululate
Uluru
Ulysses
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ultrastructure
ul·tra·struc·ture [ últrə strùkchər ]


noun 
Definition:
 
detailed structure: the minute structure of an organic substance or object that becomes evident only under electron microscopy

ul·tra·struc·tur·al [ ùltrə strúkchərəl ] adjective
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