turgor

Turgor describes the internal hydraulic pressure that keeps plant tissues rigid. It is a technical term primarily used in botany and biology to explain why a plant stands upright or why a leaf remains firm. When this pressure drops, the resulting loss of rigidity leads to wilting, making the word synonymous with structural firmness derived from water content.

As a mass noun, turgor refers to a state or quality of pressure rather than a discrete object. It does not have a plural form in standard scientific usage; one does not refer to multiple turgors, but rather to the level or loss of turgor within a specific organism or cell.