spicule
/ˈspɪkjuːl/noun
1
- technical a minute sharp-pointed object or structure that is typically present in large numbers, such as a fine particle of ice〈技〉（细小）针状物（常大量同时出现, 如冰屑）。
1.1
- Zoology each of the small needle-like or sharp-pointed structures of calcite or silica which make up the skeleton of a sponge【动】（海绵的）骨针。
2
- Astronomy a short-lived, relatively small radial jet of gas in the chromosphere or lower corona of the sun【天文】针状物。
派生词
spicular
adjectivespiculate
/-lət/ adjectivespiculation
noun词源
late 18th cent.: from modern Latin spicula, spiculum, diminutives of spica 'ear of grain'.