A small piece of plastic, metal, ivory, etc., for plucking the strings of a guitar, lyre, mandolin, etc.
A projection of bone or other stiff tissue, such as the ridges in some insects' stridulatory organs.
A sharp, needle-like piece.
A needle-like mating structure found only in male nematodes.
A tiny glass flake formed during the manufacture of glass vials
A small spike of flowers.
A jet of matter ejected from the photosphere of the sun.
Any of many needle-like crystalline structures that provide skeletal support in marine invertebrates like sponges.