A prickly shrub or plant covered with thorns, or historically, a type of hawthorn plant.
From Old English 'all' + 'thorn,' literally meaning 'full of thorns' or 'all-thorny.' The prefix 'all-' intensifies the quality of being thorny throughout the plant.
Allthorn appears in old English herbals as a plant with medicinal properties—medieval healers actually used thorny plants to treat wounds, believing the 'sharp' nature of the plant matched the condition it healed.
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