protoxylem Hear it!

protoxylem definition

proto·xylem (prōt′ō zī′ləm, -lem′)

noun

Bot. the first formed xylem of a root or stem, produced by the differentiation of the procambium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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