noun
a plural form of the noun 'acicula', which refers to a needle-like structure found in certain organisms
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The aciculae on the pine tree's needles help protect it from predators.
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I accidentally pricked myself on one of the aciculae while gardening.
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Watch out for those sharp aciculae, they can really hurt if you're not careful.
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Her words were like aciculae, piercing through his defenses and leaving him vulnerable.