- an elongated, tapering xylem cell having lignified, pitted, intact walls, adapted for conduction and support.Compare vessel(def 5).
Origin of tracheid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tracheid
Historical Examples of tracheid
As a rule buckling of a tracheid begins at the bordered pits which form places of least resistance in the walls.The Mechanical Properties of Wood
Samuel J. Record
- botany an element of xylem tissue consisting of an elongated lignified cell with tapering ends and large pits
Word Origin for tracheid
C19: from trachea (in the sense: a vessel in a plant) + -id ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- An elongated, water-conducting cell in xylem, one of the two kinds of tracheary elements. Tracheids have pits where the cell wall is modified into a thin membrane, across which water flows from tracheid to tracheid. The cells die when mature, leaving only their lignified cell walls. Tracheids are found in all vascular plants. Compare vessel element.
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