Spicule



noun
1.
a small or minute, slender, sharp-pointed body or part; a small, needlelike crystal, process, or the like.
2.
Zoology. one of the small, hard, calcareous or siliceous bodies that serve as the skeletal elements of various marine and freshwater invertebrates.
3.
Astronomy. 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).
noun
1.
Also called spiculum. a small slender pointed structure or crystal, esp any of the calcareous or siliceous elements of the skeleton of sponges, corals, etc
2.
(astronomy) a spiked ejection of hot gas occurring over 5000 kilometres above the sun’s surface (in its atmosphere) and having a diameter of about 1000 kilometres

spicule spic·ule (spĭk’yōōl) or spic·u·la (-yə-lə)
n. pl. spic·ules or spic·u·lae (-yə-lē)
A needlelike structure or part.
spic’u·lar (-yə-lər) or spic’u·late (-yə-lĭt, -lāt’) adj.
spicule
(spĭk’yl)

A needlelike structure or part, such as one of the mineral structures supporting the soft tissue of certain invertebrates, especially sponges.

Any of numerous short-lived vertical jets of hot gas rising from the solar chromosphere and extending into the corona. Spicules, which only last for about five to ten minutes, are usually several hundred kilometers wide and several thousand kilometers high.

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