spiculation

/ˌspɪkjəˈleɪʃən/
noun
  1. The formation or presence of small, needle-like structures or projections, especially in biological or medical contexts (e.g., in cells, tissues, or minerals).
    • Under the microscope, the spiculation of the sponge's skeleton was clearly visible.
    • The radiologist noted spiculation around the edges of the mass, which required further testing.
    • The spiculation seen on the X-ray suggested a possible tumor in the lung.
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