spicule: Meaning and Definition of

spic•ule

1. a small or minute, slender, sharp-pointed body or part; a small, needlelike crystal, process, or the like.
2. one of the small, hard, calcareous or siliceous bodies that serve as the skeletal elements of various marine and freshwater invertebrates.
3. a jet of gas several hundred miles in diameter rising from the sun's surface to heights of 3000 to 6000 miles (4800 to 9600 km).