单词 | tracheid |
释义 | tracheid[ trey-kee-id ] / ˈtreɪ ki ɪd / noun Botany.an elongated, tapering xylem cell having lignified, pitted, intact walls, adapted for conduction and support.Compare vessel (def. 5). Origin of tracheidFirst recorded in 1870–75; trache(a) + -id3 OTHER WORDS FROM tracheidtra·che·i·dal [truh-kee-i-dl, trey-kee-ahyd-l], /trəˈki ɪ dl, ˌtreɪ kiˈaɪd l/, adjectiveWords nearby tracheidtracheal tugging, tracheal vein, tracheary element, tracheate, tracheation, tracheid, tracheitis, trachelectomy, trachelematoma, trachelism, trachelitis Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for tracheid
British Dictionary definitions for tracheidtracheid tracheide/ (ˈtreɪkɪɪd) / nounbotany an element of xylem tissue consisting of an elongated lignified cell with tapering ends and large pits Derived forms of tracheidtracheidal (trəˈkiːɪdəl, ˌtreɪkɪˈaɪdəl), adjectiveWord Origin for tracheidC19: 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 Scientific definitions for tracheidtracheid [ trā′kē-ĭd, -kēd′ ] 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. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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