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A water-excreting microscopic epidermal structure in many plants.

[Greek hudōr, hudat-, water; see wed- in Indo-European roots + hodos, way, road.]
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.


(Botany) a pore in plants, esp on the leaves, specialized for excreting water
[C19: from Greek, from hudor water + hodos way]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhaɪ dəˌθoʊd)

a specialized leaf structure through which water is exuded.
[< German Hydathode (1894) < Greek hydat-, s. of hýdōr water + hodós way, path; compare -ode2]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hydathode - a pore that exudes water on the surface or margin of a leaf of higher plants
stoma, stomate, pore - a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
hispidula has hydathode. On the other hand, hydathode was not observed in S.
lowered leaf water potentials may affect the sensitivity of hydathode
When the aerial stomata are close from morning to the evening, the absorption of materials are doing through the hydathode and cuticle.
hydathode Openings in leaves, often at the tip, through which water can pass out in liquid form.
The hydathodes present at leaf tips or margins serve as initial entry point for pathogen.
Xoo enters rice leaf typically through the hydathodes at the leaf margin, multiplies in the intercellular spaces of the underlying epithelial tissue, and moves to the xylem vessels to cause systemic infection, which is known as kresek (Noda and Kaku., 1999; Ou., 1985).
Many species with epidermal hydathodes of Crassula from the Namib Desert in southern Africa can benefit directly from dew or fog deposited on leaf surfaces [3].
Silwet L-77 greatly reduces the surface tension of water, allowing it to infiltrate plant leaf stomata (Neumann & Prinz 1974) and hydathodes (Zidack et al.
guttation: Exudation of liquid water from hydathodes fed by vascular xylem traces.