<p><strong>Noun:</strong></p><ul><li>A small or minute, slender, sharp-pointed body or part</li><li>A small, needlelike crystal, process, or the like</li><li>(Zoology) one of the small, hard, calcareous or siliceous bodies that serve as the skeletal elements of various marine and freshwater invertebrates</li><li>(Astronomy) a jet of gas several hundred miles in diameter rising from the sun's surface to heights of 3,000 to 6,000 miles (4,800 to 9,600 km)</li></ul>