单词 | phloem |
释义 | phloem[ floh-em ] / ˈfloʊ ɛm / nounthe part of a vascular bundle consisting of sieve tubes, companion cells, parenchyma, and fibers and forming the food-conducting tissue of a plant. Origin of phloemFirst recorded in 1870–75; from German Phloëm, irregularly formed from Greek phló(os), phloiós “bark (of a tree), rind (of a fruit)” + -ēma passive noun suffix Words nearby phloemphlegmonous abscess, phlegmonous gastritis, phlegmonous mastitis, phlegmy, Phlm., phloem, phloem necrosis, phloem ray, phlogistic, phlogiston, phlogopite Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for phloemBritish Dictionary definitions for phloemphloem / (ˈfləʊɛm) / nountissue in higher plants that conducts synthesized food substances to all parts of the plant Word Origin for phloemC19: via German from Greek phloos bark 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 Cultural definitions for phloemphloem [ (floh-em) ] The system of vessels in a plant that carries food from the leaves to the rest of the plant. (See xylem.) 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. Scientific definitions for phloemphloem [ flō′ĕm′ ] A tissue in vascular plants that conducts food from the leaves and other photosynthetic tissues to other plant parts. Phloem consists of several different kinds of cells: sieve elements, parenchyma cells, sclereids, and fibers. In mature woody plants it forms a sheathlike layer of tissue in the stem, just inside the bark. See more at cambium photosynthesis. Compare xylem. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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