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[pri-dey-shuh s] /prɪˈdeɪ ʃəs/
predatory; rapacious.
Also, especially Biology, predaceous.
Origin of predacious
First recorded in 1705-15; pred(atory) + -acious
Related forms
predaciousness, predacity
[pri-das-i-tee] /prɪˈdæs ɪ ti/ (Show IPA).
especially Biology, predaceousness, noun
unpredaceous, adjective
unpredaceously, adverb
unpredaceousness, noun
unpredacious, adjective
unpredaciously, adverb
unpredaciousness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for predacious
Historical Examples
  • Indeed, its predacious habits unfit it for associating with its kind.

    Bible Animals; J. G. Wood
  • The principal obstacles to this are snow and predacious animals.

    Our Domestic Birds John H. Robinson
  • The sea-leopard, the only predacious member of the seal family, has an elongated agile body and a large head with massive jaws.

    The Home of the Blizzard Douglas Mawson
  • Thus was a graminivorous animal nurtured by a carnivorous and predacious one!

  • They cared very little about defending a state of things which their predacious instincts led them, on the contrary, to attack.

    Stronghand Gustave Aimard
  • He began to introduce domesticated animals, and that meant a thinning of the ranks of predacious creatures.

  • The predacious instinct and the combative instinct weigh down and disfigure our economic development.

  • Let us yet further imagine that this predacious species is swifter than our animal, on which it preys.

    The Making of Species Douglas Dewar
  • Were predacious creatures the most important foes of the rabbit it would never have obtained a firm foothold in Australia.

    The Making of Species Douglas Dewar
  • Similarly throat disease among wood-pigeons does more towards keeping their numbers down than all the efforts of predacious birds.

    The Making of Species Douglas Dewar
British Dictionary definitions for predacious


(of animals) habitually hunting and killing other animals for food
preying on others
Derived Forms
predaciousness, predaceousness, predacity (prɪˈdæsɪtɪ) noun
Word Origin
C18: from Latin praeda plunder; compare predatory
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
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Word Origin and History for predacious

also predaceous, 1713, from stem of predation (Latin praedari) + -acious.

Online Etymology Dictionary, © 2010 Douglas Harper
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