spicules
n.
骨针，针骨（spicule的复数）;
针状结构;
冰针;
针状冰;
例句:
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What determines the creation and dynamics of spicules remains a topicactive research.
至于针状体的成因和动力过程目前还仍是一个热门研究课题.
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Cellular marrow is seen between the spicules of bone.
可见蜂窝状骨髓位于骨板之间.
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This fauna is associated with Foraminifera, sponge spicules and Brachiopoda et al.
伴生生物有有孔虫 、 海绵骨针、腕足动物等.