primary wall

noun Botany.
the wall of a plant cell that is formed first around the protoplast, composed of cellulose microfibrils aligned at all angles and held together by hydrogen bonds.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
It is generally accepted that these growth processes are regulated by the polysaccharide components of the primary wall.
Every cell of a plant is surrounded by a primary wall that undergoes plastic extension as the cell grows.
Install backing plates or blocking as required to deliver load to primary wall framing members.
The design requirements for a high-quality secondary wall are the same as the primary wall.
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