A slender and stiff cylindrical emergence, about the size of a hair;
Slender stiff continuation of midrib in inflorescence bract.
A stiff, hair-like structure.
A stiff hair, usually erect or curving away from its attachment point.
An outgrowth from any plant organ (leaf, stem, fruit etc.) that is thicker and stiffer than a hair but thinner and weaker than a spine or prickle.