noun
a plural form of the noun 'acicula', which refers to a needle-like structure or spine found in certain animals or plants
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The aciculas on the pine tree help protect it from predators.
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I accidentally pricked my finger on one of the aciculas while climbing the tree.
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Be careful not to get stabbed by those sharp aciculas!
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His words were like aciculas, piercing through her heart with their sharpness.