Uranium-trioxide
noun, Chemistry.
1.
a radioactive orange powder, UO 3 , used in the manufacture of some ceramics.
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- Urano-
1. a combining form meaning “heavens,” used in the formation of compound words: uranography; uranometry. combining form 1. denoting the heavens: uranography urano- pref. Hard palate: uranoplasty.
- Uranography
noun 1. the branch of astronomy concerned with the description and mapping of the heavens, and especially of the fixed stars. noun 1. (obsolete) the branch of astronomy concerned with the description and mapping of the stars, galaxies, etc
- Uranology
noun, plural uranologies. Astronomy. 1. uranography. 2. a treatise on the celestial bodies.
- Uranometry
noun, Astronomy. 1. a chart of the positions of the heavenly bodies on the celestial sphere. 2. the measurement of the positions of heavenly bodies.
- Uranophobia
noun a fear of heaven; also called ouranophobia See ouranophobia Word Origin Greek uranos ‘heaven’