Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A dead, water-conducting cell in the xylem of vascular plants, having tapered ends and pits in the cell wall but lacking the perforations found in a vessel element.
from The Century Dictionary.
- noun In botany, a single elongated taper-pointed and more or less lignified cell, usually having upon its surface peculiar markings known as discoid markings or bordered pits, and especially characteristic of the wood of gymnosperms.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bot.) A wood cell with spiral or other markings and closed throughout, as in pine wood.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun botany A
tracheid cell .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun long tubular cell peculiar to xylem
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Dendroclimatic analysis of tree-ring width, tracheid dimension and wood density variations in conifers along the regional temperature gradient (the Yenisey Meridian).
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It positively influences tracheid production and explains up to 70% of the variability in tree-ring width.
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_F_, cross-section of a tracheid passing through two of the pits in the wall (_p_), × 300.
Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell
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At _y_, the section has passed through the wall of a tracheid, bearing a row of pits, × 150.
Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell
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[9] A vessel differs from a tracheid in being composed of several cells placed end to end, the partitions being wholly or partially absorbed, so as to throw the cells into close communication.
Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell
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Their walls are perforated (pierced with a hole or many holes) so that water can freely flow from one tracheid to the other.
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In ferns and conifers, the xylem only contains tracheid.
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Their walls are perforated (pierced with a hole or many holes) so that water can freely flow from one tracheid to the other.
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In ferns and conifers, the xylem only contains tracheid.
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Their walls are perforated (pierced with a hole or many holes) so that water can freely flow from one tracheid to the other.
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