pentoxide

[ pen-tok-sahyd ]

/ pɛnˈtɒk saɪd /

noun Chemistry.

an oxide containing five atoms of oxygen, as phosphorus pentoxide, P2O5.

Nearby words

pentose nucleic acid, pentose phosphate pathway, pentosuria, pentothal, pentothal sodium, pentoxide, pentoxifylline, pentstemon, pentyl, pentyl acetate, pentyl group

Origin of pentoxide

1860–65; pent- + oxide

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pentoxide

It burns when heated in air, forming the pentoxide and sulphur dioxide.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6|Various
Columbium pentafluoride, CbF5, is obtained when the pentoxide is dissolved in hydrofluoric acid.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6|Various
The oxyfluoride, CbOF3, results when a mixture of the pentoxide and fluorspar is heated in a current of hydrochloric acid.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6|Various
It is only known in solution; evaporation of the solution yields the pentoxide.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6|Various

It burns readily in air, and is converted into the pentoxide when fused with acid potassium sulphate.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6|Various

British Dictionary definitions for pentoxide

pentoxide

/ (pɛntˈɒksaɪd) /

noun

an oxide of an element with five atoms of oxygen per molecule

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012