[proh-tuh-zahy-luh m, -lem]
- the part of the primary xylem that develops first, consisting of narrow, thin-walled cells.
Origin of protoxylem
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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
- The first formed xylem that differentiates from the procambium.
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