WordReference Random House Unabridged Dictionary of American English © 2019
ar•che•spore  (ärkə spôr′, -spōr′),USA pronunciation n. [Bot.]
  1. Botanythe primitive cell, or group of cells, that give rise to the cells from which spores are derived.
ar′che•spori•al, adj. 
  • arche- + spore 1900–05

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