xylem
a compound tissue in vascular plants that helps provide support and that conducts water and nutrients upward from the roots, consisting of tracheids, vessels, parenchyma cells, and woody fibers.
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Origin of xylem
1Words Nearby xylem
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use xylem in a sentence
This strategy suggests that the negative pressures of xylem sap can exceed one megapascal.
Froghoppers are the super-suckers of the animal world | Jonathan Lambert | July 13, 2021 | Science NewsSuch a feat seemed so unlikely for the tiny insects that some scientists questioned whether xylem sap truly could be under such negative pressures.
Froghoppers are the super-suckers of the animal world | Jonathan Lambert | July 13, 2021 | Science NewsExtra xylem and phloem help the stem pump more food and water into the fruit, leaving less for the rest of the plant.
Here’s how giant pumpkins get so big | Bethany Brookshire | October 28, 2020 | Science News For Studentsxylem, zī′lem, n. the woody part of vegetable tissue—opposed to the phlom, or bast part.
All round the xylem and the phloëm there are many thick-walled cells.
A Handbook of Some South Indian Grasses | Rai Bahadur K. Ranga Achariyar
These vessels together with the numerous small thick-walled cells lying between the pitted vessels constitute the xylem.
A Handbook of Some South Indian Grasses | Rai Bahadur K. Ranga AchariyarJust above the xylem there is a group of large and small thin-walled cells.
A Handbook of Some South Indian Grasses | Rai Bahadur K. Ranga AchariyarThe larger bundles are normal in every way, while in the smaller ones the xylem elements are considerably reduced.
A Handbook of Some South Indian Grasses | Rai Bahadur K. Ranga Achariyar
British Dictionary definitions for xylem
/ (ˈzaɪləm, -lɛm) /
a plant tissue that conducts water and mineral salts from the roots to all other parts, provides mechanical support, and forms the wood of trees and shrubs. It is of two types (protoxylem and metaxylem), both of which are made up mainly of vessels and tracheids: See also protoxylem, metaxylem
Origin of xylem
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for xylem
[ zī′ləm ]
A tissue in vascular plants that carries water and dissolved minerals from the roots and provides support for softer tissues. Xylem consists of several different types of cells: fibers for support, parenchyma for storage, and tracheary elements for the transport of water. The tracheary elements are arranged as long tubes through which columns of water are raised. In a tree trunk, the innermost part of the wood is dead but structurally strong xylem, while the outer part consists of living xylem, and beyond it, layers of cambium and phloem. See more at cambium capillary action. Compare phloem.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for xylem
[ (zeye-luhm) ]
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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