Spicule

Spicules are any of various small needle-like anatomical structures occurring in organisms

Spicule may also refer to:
 * Spicule (sponge), small skeletal elements of sea sponges
 * Spicule (nematode), reproductive structures found in male nematodes (roundworms)
 * Spicule (solar physics), jets of solar material from the Sun
 * Spicule (glass manufacture), glass flakes formed in the production of glass vials.