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Webster 1828 Edition

Noun.

The quality of being rapacious; disposition to plunder or to exact by oppression.

rapaciousness ‎(uncountable)

The state of being rapacious; extreme gluttony
- 2015, Elizabeth Royte, Vultures Are Revolting. Here’s Why We Need to Save Them., National Geographic (December 2015)
  THE VULTURE MAY be the most maligned bird on the planet, a living metaphor for greed and rapaciousness.