archespore
noun
ar·che·spore
ˈärkə̇ˌspō(ə)r
variants
or archesporium
ˌ⸗⸗ˈspōrēəm
plural archespores
-rz
or archesporia
-ōrēə
: the cell or group of cells from which spore mother cells develop (as those from which the microspores develop in the pollen sac or the megaspore in the ovule)
archesporial
adjective
¦⸗⸗¦spōrēəl
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Merriam-Webster unabridged
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