海绵骨针（sponge spicule）是指生长在海洋或淡水环境中的一种最简单的多细胞生物即海绵的骨架。主要骨架与支撑是玻璃纤维状的硅质骨针。也有钙质骨针。
n. caltrop
misc. sponge spicule
伴生生物有有孔虫、海绵骨针、腕足动物等。
This fauna is associated with Foraminifera, sponge spicules and Brachiopoda et al.
研究了我国渤海海域发现的一种硅质海绵骨针的结构和力学性能。
The structure and mechanical properties of silica sponge spicule found in China Bo-hai were studied.
研究了海绵骨针形态、元素组成等特征，并对其天然产物进行了分离纯化、结构鉴定和活性检测。
The characters including spicule morphology and elemental compositions, chemical constituents and bioactivity of the marine sponge were studied.
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