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(Botany) botany (of a xylem strand) having the first-formed xylem internal to that formed later. Compare exarch1
[C20: from endo- + Greek arkhē beginning]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
(of a primary xylem or root) developing from the periphery; having the oldest cells closest to the core.
[1895–1900; end- + -arch having a point of origin]
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