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A chemical compound containing four oxygen atoms per molecule.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(tɛˈtrɒksaɪd) or


(Elements & Compounds) any oxide that contains four oxygen atoms per molecule: osmium tetroxide, OsO4.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(tɛˈtrɒk saɪd, -sɪd)

an oxide whose molecule contains four atoms of oxygen.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tetroxide - an oxide containing four atoms of oxygen in the molecule
oxide - any compound of oxygen with another element or a radical
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
This is an observation encountered in tissues that are fixed in glutaraldehyde and postfixed in osmium tetroxide.[4] These neuroendocrine cells appeared primitive with sparse RER and rudimentary intracellular junctions more consistent with a neoplastic origin than entrapment or influx of normal cells.
For transmission electron microscopy (TEM), small pieces of testis with mature spermatozoa were fixed for 1 h with 2% glutaraldehyde in 0.1 M phosphate buffer (pH 7.4), and postfixed with 1% osmium tetroxide in the same buffer for 1 h.
Frog sartorious muscles were fixed with glutaraldehyde and osmium tetroxide solutions and embedded in resin, then sliced into thin sections and mounted in a matching index medium (Euparal) on a strain-free microscope slide.
After a brief rinse in buffer, the tissue was postfixed in 2% osmium tetroxide for 1 h, washed in buffer, dehydrated in ethanol, cleared in propylene oxide, and embedded in plastic.
Approximately 2,600 pounds of high purity hydrazine was supplied for the rocket launch and payload and 755 pounds of dinitrogen tetroxide for the payload to deploy the fifth U.S.
Just before the SuperDraco thrusters were ignited, a "slug" of nitrogen tetroxide (NTO) oxidizer was sent into a helium check valve made of titanium, which caused the valve to ignite, leading to the vehicle's explosion.
Today, the Yazoo City nitrogen manufacturing facility is located on approximately 2,240 acres and includes one ammonia plant, four nitric acid plants, an ammonium nitrate (AN) plant, two urea plants, a UAN plant, and a tetroxide production and storage facility.
For the SEM analysis, the eggs were removed from the filter paper using a brush, fixed in 2.5% glutaraldehyde, and post-fixed in 1% osmium tetroxide, both in 0.1 M sodium cacodylate buffer at 7.2 pH.
Thin slices of lung tissue fixed in formalin can be postfixed and stained in osmium tetroxide solution and subsequently submitted for paraffin embedding.
The samples were cut into 3 [mm.sup.*] 3 [mm.sup.*] 5 mm and fixed with 3% glutaraldehyde overnight, rinsed 3 times in 0.1 M phosphate buffer (pH 7.2), and postfixed in 1% of osmium tetroxide at 4[degrees]C for 2 h before being dehydrated with graded ethanol.
Singlet oxygen might also react with methionine persulfoxide 2 to form ozone and methionine sulfoxide 3 via tetroxide intermediate 5 (Scheme 1).