aculeus
Webster's Unabridged Dictionary:
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A·cu·le·us
n. pl. Aculei .
[L., dim. of acus needle.]
1. (Bot.) A prickle growing on the bark, as in some brambles and roses. Lindley.
2. (Zoöl.) A sting.
[L., dim. of acus needle.]
1. (Bot.) A prickle growing on the bark, as in some brambles and roses. Lindley.
2. (Zoöl.) A sting.
