Definition - What does Leaf Tendril mean?
A leaf tendril is a thread-like part of a leaf that attaches to a surface in order to help a vining plant secure itself. The leaf tendril is a specialized plant organ possessing a twining growth tendency that encircles any object it encounters.
MaximumYield explains Leaf Tendril
In order for plants that vine to have the ability to stabilize themselves as they climb, they need an appendage that will cling to the objects they are climbing. A leaf tendril does this for them as it extends from the plant and winds itself around nearby objects.
Leaf tendrils enable growing plants to climb and vine around trees, up fences, and up trellises. They also help stabilize plants during high winds.