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.See also Ossicle, any various small bones Process (anatomy), any outgrowths of tissue Sclerite, hardened body parts of invertebrates Spikelet, the inflorescence of grasses Stylet (anatomy), a piercing structure Tubercle, wart-shaped outgrowths of body tissue