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.
A sharp, needle-like structure, especially those making up the skeleton of a sponge.
A thrusting javelin used by Romans that replaced the pilum in the late 3rd century.
A sharp, pointed crystal, especially of ice.
A small radial emission of gas seen in the chromosphere and corona of the sun.