overabundance; excess: a plethora of advice and a paucity of assistance.
Pathology Archaic. a morbid condition due to excess of red corpuscles in the blood or increase in the quantity of blood.

1535–45; < Neo-Latin < Greek plēthṓra fullness

dearth, plethora. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
plethora (ˈplɛθərə)
1.  superfluity or excess; overabundance
2.  obsolete pathol a condition caused by dilation of superficial blood vessels, characterized esp by a reddish face
[C16: via Medieval Latin from Greek plēthōrē fullness, from plēthein to grow full]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Cite This Source's 21st Century Lexicon
Main Entry:  plethora
Part of Speech:  n
Definition:  excess; overabundance
Etymology:  Greek 'fullness''s 21st Century Lexicon
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Word Origin & History

1540s, a medical word for "excess of body fluid," from L.L. plethora, from Gk. plethore "fullness," from plethein "be full" (see poly-). Figurative meaning "too much, overfullness in any respect" is first recorded 1700.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

plethora pleth·o·ra (plěth'ər-ə)

  1. An excess of blood in the circulatory system or in one organ or area.

  2. An excess of any of the body fluids.

ple·thor'ic (plě-thôr'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The proper word may be landslide rather than plethora.
But the plethora of commercial interruptions is often hard to take.
In the humanities, for instance, there are a plethora of book prizes.
We've already got a plethora of devices and substances for that.
Related Words
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