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mesarch

[mez-ahrk, mes-, mee-zahrk, -sahrk] /ˈmɛz ɑrk, ˈmɛs-, ˈmi zɑrk, -sɑrk/
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.
Origin
1890-1895
1890-95; mes- + -arch
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for mesarch

mesarch

/ˈmɛsɑːk/
adjective
1.
(botany) (of a xylem strand) having the first-formed xylem surrounded by that formed later, as in fern stems Compare exarch2 , endarch
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
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