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mesarch

[ mez-ahrk, mes-, mee-zahrk, -sahrk ]

adjective

  1. Botany. (of a primary xylem or root) developing from both the periphery and the center; having the older cells surrounded by the younger cells.
  2. Ecology. (of a sere) originating in a mesic habitat.

mesarch

/ ˈmɛsɑːk /

adjective

  1. botany (of a xylem strand) having the first-formed xylem surrounded by that formed later, as in fern stems Compare exarch 2 endarch
“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
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Word History and Origins

Origin of mesarch1

First recorded in 1890–95; mes- + -arch
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Word History and Origins

Origin of mesarch1

C19: from mes ( o )- + Greek arkhē beginning
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Example Sentences

The mesarch structure of the leaf-bundles is met with in a less pronounced form in the flower peduncles of some cycads.

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mésallianceMesa Verde

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