• WordNet 3.6
    • adj pestilential likely to spread and cause an epidemic disease "a pestilential malignancy in the air"- Jonathan Swift","plaguey fevers"
    • ***
Webster's Revised Unabridged Dictionary
    • Pestilential Having the nature or qualities of a pestilence. "Sends the pestilential vapors."
    • Pestilential Hence: Mischievous; noxious; pernicious; morally destructive. "So pestilential , so infectious a thing is sin."
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Century Dictionary and Cyclopedia
    • pestilential Producing or tending to produce infectious disease; pestiferous.
    • pestilential Mischievous; pernicious; destructive.
    • pestilential Partaking of the nature of pestilence or any infectious and deadly disease: as, a pestilential fever. See fever. Synonyms Malignant, noxious, deadly.
    • ***
Chambers's Twentieth Century Dictionary
    • Pestilential of the nature of pestilence: producing pestilence: destructive
    • ***


Webster's Revised Unabridged Dictionary
Cf. F. pestilentiel,
Chambers's Twentieth Century Dictionary
Fr. peste—L. pestis, a contagious disease.


In literature:

It was like a pestilential rock dropped on earth.
"The Works of Guy de Maupassant, Volume VIII." by Guy de Maupassant
The water was pestilential.
"Across Coveted Lands" by Arnold Henry Savage Landor
Though the atmosphere be pestilential, it does not always infect trees and roots.
"Commentary on Genesis, Vol. II" by Martin Luther
Thus the filth of all the noisome and pestilential sewers of government was poured into one channel.
"Critical and Historical Essays, Volume III (of 3)" by Thomas Babington Macaulay
The conventions of dress are sometimes pestilential.
"Heart of the Blue Ridge" by Waldron Baily
And it would leave the cave well cleansed of pestilential insects.
"In the Morning of Time" by Charles G. D. Roberts
The pestilential leaven of freedom had been at work while monarchies slept in security.
"A Short History of Spain" by Mary Platt Parmele
The upper crust is pestilential.
"Diary from November 12, 1862, to October 18, 1863" by Adam Gurowski
The atmosphere of such places becomes pestilential.
"The Turkish Bath" by Robert Owen Allsop
We had arrived too late to procure cabin places, and were obliged to dine in an unsavoury den, reeking with pestilential odours.
"Notes in North Africa" by W. G. Windham

In poetry:

If burning beams of noon conspire
To dart a pestilential fire,
God is their life; his wings are spread
To shield them with a healthful shade.
"Psalm 91 part 1" by Isaac Watts
When pestilential famine's breath
Swept through the camp at Valley Forge,
There black and white men slept in death,
And gentle Schuylkill sang their dirge.
"The Black Man's Wrongs" by James Madison Bell
'Tis oftenest lost through the deadly blight
Of Society's pestilential air,
Which blackens the robe of purest white,
And fouls what once was sweet and fair.
"Friendship" by John Lawson Stoddard

In news:

Before we get to the blocking and tackling of 2011, The Dash must bid goodbye and good riddance to a putrid, pestilential offseason.

In science:

C∞ tensors thereof ), that is responsible for all those pestilential infinities.
`Iconoclastic', Categorical Quantum Gravity