Definition of pentoxide in English:
 pentoxide
noun pɛnˈtɒksʌɪdpenˈtäksīd
Chemistry An oxide containing five atoms of oxygen in its molecule or empirical formula.
 Example sentencesExamples
-  Glass-forming substances are usually silica, boric oxide, phosphorous pentoxide, or feldspars.
 -  In one method, naphthalene is oxidized with vanadium pentoxide to give phthalic anhydride.
 -  It would also involve the re-tubing of two primary wet electrostatic precipitators, the pre-heater exchanger and replacement of 6,000 litres of vanadium pentoxide catalyst in the converter.
 -  The procedure was repeated three times and the filtrate was dried in an oven at 100°C and cooled over phosphorus pentoxide.
 -  The thin covering is composed of alternating layers of silicon dioxide and tantalum pentoxide.