| 单词 | protostele |
| 释义 | protostele[ proh-tuh-steel, -stee-lee ] / ˈproʊ təˌstil, -ˌsti li / noun Botany.the solid stele of most roots, having a central core of xylem enclosed by phloem. Origin of protosteleFirst recorded in 1900–05; proto- + stele OTHER WORDS FROM protostelepro·to·ste·lic [proh-tuh-stee-lik], /ˌproʊ təˈsti lɪk/, adjectiveWords nearby protosteleprotoporphyrin IX, protopresbyter, Protosemitic, protospasm, protostar, protostele, protostome, Proto team, prototherian, prototroph, prototrophic Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for protostele
British Dictionary definitions for protosteleprotostele / (ˈprəʊtəˌstiːl, -ˌstiːlɪ) / nouna simple type of stele with a central core of xylem surrounded by a cylinder of phloem: occurs in most roots and the stems of ferns, etc Derived forms of protosteleprotostelic, adjectiveCollins 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 protosteleprotostele [ prō′tə-stēl′, prō′tə-stē′lē ] The most primitive form of stele, consisting of a solid core of xylem encased by phloem or of xylem interspersed with phloem. The roots of all vascular plants, as well as the stems of lycophytes, have protosteles. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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