| 单词 | protoxylem |
| 释义 | protoxylem[ proh-tuh-zahy-luhm, -lem ] / ˌproʊ təˈzaɪ ləm, -lɛm / noun Botany.the part of the primary xylem that develops first, consisting of narrow, thin-walled cells. Origin of protoxylemFirst recorded in 1895–1900; proto- + xylem Words nearby protoxylemprototroph, prototrophic, prototype, protovertebra, protoxide, protoxylem, Protozoa, protozoan, protozoiasis, protozoicide, protozoology Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for protoxylemprotoxylem / (ˌprəʊtəˈzaɪləm) / nounthe first-formed xylem tissue, consisting of extensible thin-walled cells thickened with rings or spirals of ligninCompare metaxylem 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 protoxylemprotoxylem [ prō′tə-zī′ləm ] The first formed xylem that differentiates from the procambium. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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