DICT.TW Dictionary Taiwan

 aculeus
 刺,螫刺

 A·cu·le·us n.; pl. Aculei
 1. Bot. A prickle growing on the bark, as in some brambles and roses.
 2. Zool. A sting.
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 aculeus
      n 1: a stiff sharp-pointed plant process
      2: a sharp-pointed process especially a sting of a
         hymenopterous insect