archespore

from The Century Dictionary.

• noun In botany, a layer of small cells within the anther, giving rise to the mother-cells of the pollen and to the very delicate lining of the anther-cell. The name is also given to a similar structure in some of the vascular cryptogams.

from the GNU version of the Collaborative International Dictionary of English.

• noun same as archesporium.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun primitive cell or group of cells from which a mother cell develops