Spicular

Definitions

  • Webster's Revised Unabridged Dictionary
    • a Spicular Resembling a dart; having sharp points.
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Century Dictionary and Cyclopedia
    • spicular In zoology:
    • spicular Having the form or character of a spicule; resembling a spicule; dart-like; spiculiform; spiculate.
    • spicular Containing or composed of spicules; spiculous; spiculiferous or spiculigenous: as, a spicular integument; the spicular skeleton of a sponge or radiolarian.
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Chambers's Twentieth Century Dictionary
    • adjs Spicular resembling a dart: in the shape of, or having, sharp points
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Etymology

Webster's Revised Unabridged Dictionary
L. spiculum, a dart: cf. F. spiculaire,
Chambers's Twentieth Century Dictionary
L. spica, an ear of corn.

Usage

In literature:

The silica was derived from the tests of radiolaria and the spicular skeletons of sponges.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5" by Various
Siliceous monaxon sponges in which the horny skeleton is much reduced or absent and the spicular skeleton is more or less definitely reticulate.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
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In science:

Coherent apparently upward motions were also detected at network boundaries along spicular-like structures.
The Structure and Dynamics of the Upper Chromosphere and Lower Transition Region as Revealed by the Subarcsecond VAULT Observations
We used these images to verify that the emission under the SUMER slit comes only from spicular material and no other features like, for instance, coronal bright points, are present.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
Bottom left: EIT 304 ˚A image of the same region showing spicular emission.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
The derived DEM distribution was used to analyse the thermal response of the AIA 171 ˚A channel to spicular emission.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
The aim of the present study was to derive a DEM distribution for a region dominated by spicular emission, best described by an off-limb environment above a coronal hole.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
Until now spicular studies have always been spoken about in context to the quiet Sun.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
However, in this paper using spicular, prominence and quiet-Sun DEM distributions, we demonstrated that there is an obvious difference in how the Fe ix 171.07 ˚A emission changes in these regions.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
However, the EIT images do not distinctly reveal spicular structure due to some instrumental limitations: low spatial resolution and high stray-light contribution.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
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