etiolation


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e·ti·o·late

 (ē′tē-ə-lāt′)
v. e·ti·o·lat·ed, e·ti·o·lat·ing, e·ti·o·lates
v.tr.
1. Botany To cause (a plant) to develop without chlorophyll by preventing exposure to sunlight.
2.
a. To cause to appear pale and sickly: a face that was etiolated from years in prison.
b. To make weak by stunting the growth or development of.
v.intr. Botany
To become blanched or whitened, as when grown without sunlight.

[French étioler, from Norman French étieuler, to grow into haulm, from éteule, stalk, from Old French esteule, from Vulgar Latin *stupula, from Latin stipula.]

e′ti·o·la′tion n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

etiolation

1. the process of growing plants away from the light to make them white and crisp, especially in vegetable gardening.
2. the condition of the plants grown in this manner. See also disease and illness.
See also: Plants
paleness of color as a result of illness or exclusion from light. See also plants.
See also: Complexion, Disease and Illness
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.etiolation - a pale and sickly appearance; "his etiolation signaled years in prison"
appearance, visual aspect - outward or visible aspect of a person or thing
2.etiolation - the act of weakening by stunting the growth or development of something; "the etiolation of the critical tradition"
weakening - the act of reducing the strength of something
3.etiolation - (botany) the act of causing a plant to develop without chlorophyll by growing it without exposure to sunlight; "the etiolation of celery"
bleach - the act of whitening something by bleaching it (exposing it to sunlight or using a chemical bleaching agent)
phytology, botany - the branch of biology that studies plants
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
References in periodicals archive ?
Etiolation causes a series of anatomical and physiological modifications, such as reduction of phloem fibers, promotion of cell wall elongation, and increase of undifferentiated tissues of the parenchyma.
Some protocorms at physiological age 120 DASI have formed pro-embryogenic structures, which showed rounded shape and translucent color (Figure 1A), whereas other protocorms at the same physiological age have shown leaf primordia with etiolation features; these protocorms have presented pro-embryogenic structures on their bases (Figure 1B).
Ken Smith, president of the Revitalize South Dallas Coalition, points to a decades-long flight of core institutions from the park as a source of general etiolation. The Dallas Museum of Art relocated in 1984, the Dallas Symphony Orchestra in 1989, the Dallas Opera in 2009, and, most recently, the Museum of Science in 2012, which made occasional use of its former Fair Park facilities but has gradually been phasing out their use.
These results prove that the plants developed a greater growth in height than the diameter in a short period of time, proving the etiolation. Carnevali (2014), studying the use of gypsum and phosphorus in the initial growth and nutritional efficiency of Brazilian pepper tree, found that in full sun at 165 days after the plants had higher height (61.8 cm) and larger diameter (9.36 mm) at the highest [P.sub.2][O.sub.5] dose.
(2011), the etiolation (growth in the absence of light) consists of a strategy of the plant to increase the forage canopy in search of luminosity, and this increase usually occurs by stretching the stem.
The higher the value of this parameter, the better the quality of the seedlings (Gomes et al., 2002), because they show low H/D ratio (without etiolation), balance in the SDM/RDM ratio (seedlings with root system capable of supplying the shoots) and high values of biomass (Abreu et al., 2017).
Higher plants tend to absorb more red light (R) and reflect far-red light (FR), which alters the R/FR ratio, reducing the light quality for lower plants in the canopy and causing etiolation (Ballare, 2014).
Etiolation is primarily a botanical condition, but here it is extended to the idea that metropolitan existence, a removal from light, damages human vitality, that ennui becomes life threatening.
After 25 days, explants were transferred to continuous light conditions to avoid the etiolation process, preserving state and composition of culture medium, and allowing their complete development.
Carbohydrate reserves of intermediate wheatgrass after clipping and etiolation treatments.