• synonyms


[mez-ahrk, mes-, mee-zahrk, -sahrk]
  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.
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Origin of mesarch

First recorded in 1890–95; mes- + -arch
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for mesarch

Historical Examples

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

    Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7


British Dictionary definitions for mesarch


  1. botany (of a xylem strand) having the first-formed xylem surrounded by that formed later, as in fern stemsCompare exarch 2, endarch
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Word Origin

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