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protoxylem

[ proh-tuh-zahy-luhm, -lem ]

noun

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


protoxylem

/ ˌprəʊtəˈzaɪləm /

noun

  1. the first-formed xylem tissue, consisting of extensible thin-walled cells thickened with rings or spirals of lignin Compare 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


protoxylem

/ prō′tə-zīləm /

  1. The first formed xylem that differentiates from the procambium.


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Word History and Origins

Origin of protoxylem1

First recorded in 1895–1900; proto- + xylem

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protoxideProtozoa