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Related to middle lamella: Primary cell wall
middle lamella(pl. lamellae) the thin membrane separating two adjacent plant cells, whose function is to cement them together. It consists of varying amounts of PECTIN, depending on IAA concentration (see Fig. 222 ).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005