Epinastic

/ˌɛpɪˈnæstɪk/ adjective

Definition

Relating to epinasty, a condition in plants where the upper surface grows faster than the lower surface, causing the leaf or stem to curve downward.

Etymology

From Greek epi- (upon) + nastos (pressed down). A botanical term describing growth differential in plants.

Kelly Says

When a plant leaf curves downward because the top grows faster than the bottom, that's epinasty—it's like if your fingernail grew only on the outside edge and naturally curled down.

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