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spicule

 - 6 dictionary results

spic⋅ule

  [spik-yool]
Use spicule in a Sentence
–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).
Origin:
1775–85; < L spīculum spearhead, arrowhead, bee stinger, equiv. to spīc(a) ear of grain (see spica ) + -ulum -ule
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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spic·ule   (spĭk'yōōl)   
n.   pl. spic·ules also spic·u·lae (-yə-lē)
A small needlelike structure or part, such as one of the silicate or calcium carbonate processes supporting the soft tissue of certain invertebrates, especially sponges.

[Latin spīculum; see spiculum.]
spic'u·lar (-yə-lər), spic'u·late (-yə-lĭt, -lāt') adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: spic·ule
Pronunciation: 'spik-(")yü(&)l
Function: noun
: a minute slender pointed usually hard body (as of bone)
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

spicule spic·ule (spĭk'y&oomacr;l) 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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
spicule   (spĭk'yl)  Pronunciation Key 

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

  2. 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.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia

spicule

a jet of dense gas ejected from the Sun's chromosphere. Spicules occur at the edges of the chromospheric network, where magnetic fields are stronger. They extend up to 10,000 km (6,000 miles) and, although they fall back to the Sun, are thought to contribute to the solar wind by feeding material into the corona

Learn more about spicule with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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