verb (used with object), etiolated, etiolating.
to cause (a plant) to whiten or grow pale by excluding light: to etiolate celery.
to cause to become weakened or sickly; drain of color or vigor.
verb (used without object), etiolated, etiolating.
(of plants) to whiten or grow pale through lack of light.

1785–95; < French étioler to make pale, etiolate (plants), probably derivative, based on N French dial. forms, of standard French éteule, Old French estoble, estuble stubble; see -ate1

etiolation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
etiolate (ˈiːtɪəʊˌleɪt)
1.  botany to whiten (a green plant) through lack of sunlight
2.  to become or cause to become pale and weak, as from malnutrition
[C18: from French étioler to make pale, probably from Old French estuble straw, from Latin stipula]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1791, from Fr. étoiler, from Norman dialect étule, O.Fr. esteule, from L. stipula "straw." Related: Etiolated.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
etiolation   (ē'tē-ə-lā'shən)  Pronunciation Key 
A pathological condition of plants that grow in places that provide insufficient light, as under stones. It is characterized by elongated stems and pale color due to lack of chlorophyll.

etiolate verb
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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