Having small points or sharp projections; ending in or covered with tiny pointed tips.
From Latin 'acumen' (sharpness) + '-ulate' suffix (a diminutive form meaning small or having a small version of something). This combines the idea of acumen with the diminutive, suggesting many small sharp points. It's a more specialized botanical term than 'acuminate.'
This word is basically saying 'full of tiny points'—imagine something covered in microscopic little needles. Scientists needed a word more specific than 'pointy' that could describe the difference between one sharp tip and lots of little pointy bumps.
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