mesarch

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.

Origin:
1890–95; mes- + -arch

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World English Dictionary
mesarch (ˈmɛsɑːk)
 
adj
botany exarch Compare endarch (of a xylem strand) having the first-formed xylem surrounded by that formed later, as in fern stems
 
[C19: from mes(o)- + Greek arkhē beginning]

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