| Spicule 1. (n.) A minute, slender granule, or point. 2. (n.) Same as Spicula. 3. (n.) Any small calcareous or siliceous body found in the tissues of various invertebrate animals, especially in sponges and in most Alcyonaria. Thesaurus Entries bramble, brier, bristle, burr, cactus, catchweed, cleavers, goose grass, needle, nettle, pine needle, prickle, quill, spiculum, spike, spikelet, spine, sticker, thistle, thorn, yucca |