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protoxylem

[ proh-tuh-zahy-luh m, -lem ]
/ ˌproʊ təˈzaɪ ləm, -lɛm /

noun Botany.

the part of the primary xylem that develops first, consisting of narrow, thin-walled cells.

Nearby words

  1. prototype,
  2. prototypical,
  3. protovertebra,
  4. protoxid,
  5. protoxide,
  6. protozoa,
  7. protozoan,
  8. protozoiasis,
  9. protozoic,
  10. protozoicide

Origin of protoxylem

First recorded in 1895–1900; proto- + xylem
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for protoxylem

protoxylem

/ (ˌprəʊtəˈzaɪləm) /

noun

the 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

Science definitions for protoxylem

protoxylem

[ 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.