mesarch

American  

[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.

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mesarch British  

/ 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

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Etymology

Origin of mesarch

First recorded in 1890–95; mes- + -arch