primary wall

American  

noun

Botany.

1. 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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Example Sentences

To finish off the room, on the primary wall of the bedroom, a Japanese-inspired vintage panel from Tolles’ own collection is framed as a piece of art.

From Los Angeles Times • Feb. 4, 2026

In places where no barriers previously existed, the administration built a total of 47 miles of new primary wall.

From New York Times • Feb. 27, 2022

Trucks and bulldozers worked around the clock, pushing up secondary levees wherever the battering flood water weakened the primary wall.

From Time Magazine Archive

The young cell-wall is always tenuous and flexible, and may remain so throughout, but in many cases thickenings and structural differentiations, as well as the changes referred to above, alter the primary wall considerably.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

When wood fails in this manner the thin fibre walls are torn in two lengthwise while the thick-walled fibres are usually pulled apart along the primary wall.

From The Mechanical Properties of Wood Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing by Record, Samuel J.