Learn how to say Spicule correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word spicule:
1 technical a minute sharp-pointed object or structure that is typically present in large numbers, such as a fine particle of ice.
Zoology each of the small needle-like or sharp-pointed structures of calcite or silica which make up the skeleton of a sponge.
2 Astronomy a short-lived, relatively small radial jet of gas in the chromosphere or lower corona of the sun.
late 18th century: from modern Latin spicula, spiculum, diminutives of spica ‘ear of grain’