• WordNet 3.6
    • adj unpolluted free from admixture with noxious elements; clean "unpolluted streams","a contaminated lake"
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Century Dictionary and Cyclopedia
    • unpolluted Not polluted; not defiled; not corrupted; pure; unspotted.
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Chambers's Twentieth Century Dictionary
    • adj Unpolluted un-po-lū′ted not polluted.
    • ***


In literature:

I envy you your peace of mind, your clean conscience, your unpolluted memory.
"Jane Eyre" by Charlotte Bronte
The woman finished her song and seated herself close to the little window, as if grateful for the unpolluted air that entered it.
"Whirligigs" by O. Henry
With a gasping cry I fell back, fighting for breath, for a breath of clean air unpolluted with hashish.
"The Quest of the Sacred Slipper" by Sax Rohmer
The vast stock of paper, much of which was still unpolluted by types, furnished an immense bonfire.
"The History of England from the Accession of James II." by Thomas Babington Macaulay
Unpolluted by the Actual, the Ideal lives only with Art and Beauty.
"Zanoni" by Edward Bulwer Lytton
Every morning we bathed in the unpolluted waters of the river.
"In the Footprints of the Padres" by Charles Warren Stoddard
And when I have gotten this unpolluted draught?
"The Seven Plays in English Verse" by Sophocles
Telemachus slew not the wife of Ulysses, for she married not a husband on a husband, but her marriage-bed remains unpolluted in the palace.
"The Tragedies of Euripides, Volume I." by Euripides
It is a vile world and yet I am unpolluted.
"In the Days of Poor Richard" by Irving Bacheller
How sweet is it to see a stream flowing clear and unpolluted over a snow-white channel!
"The Letters of Cassiodorus" by Cassiodorus (AKA Magnus Aurelius Cassiodorus Senator)

In poetry:

O sublime and unpolluted vessel,
not drained
in the dance in the old cave
and not running with sores inflicted by the Ancient Enemy.
"O Jerusalem" by Hildegard von Bingen
Her fortune was forewritten even then--
That fortune in the coming years to be
"Mother of States and unpolluted men,"
And nurse of Liberty.
"Arms And The Man - The Colonies" by James Barron Hope
Hail, girl of a noble house,
shimmering and unpolluted,
you pupil in the eye of chastity,
you essence of sanctity,
which was pleasing to God.
"Ave, Generosa" by Hildegard von Bingen

In news:

Science Journals Must Be Unpolluted by Politics.
Did you know Tennesseans have a right to unpolluted streams and rivers.

In science:

Turbulence stretches the pollutants, produces concentration structures at small scales, and brings the pollutants and the unpolluted flow in closer contact.
The Pollution of Pristine Material in Compressible Turbulence
The predictions of these models for the mass fraction of unpolluted or slightly polluted flow are derived in §4.
The Pollution of Pristine Material in Compressible Turbulence
Translating the physical discussion above to the mixing process of the unpolluted fluid elements in a turbulent flow gives the following picture.
The Pollution of Pristine Material in Compressible Turbulence
The turbulent velocity stretches the pollutants into smaller and smaller structures, and brings them to closer contact with the unpolluted flow.
The Pollution of Pristine Material in Compressible Turbulence
When the separation between the pollutant structures and the unpolluted fluid elements becomes close to or smaller than the diffusion scale, molecular diffusivity efficiently mixes them, reducing the unpolluted mass fraction.
The Pollution of Pristine Material in Compressible Turbulence