1. Having spines or spine-like projections; spiny.
Usage: botanical and zoological term
2. Relating to or resembling an acanthus plant or its decorative motif.
Usage: architectural and design term

Examples

• The acanthous leaves of the thistle plant protect it from herbivores.
• Sea urchins are acanthous creatures covered in protective spines.
• The acanthous design on the Corinthian capital is inspired by the acanthus plant.
• Many desert plants have evolved acanthous features to deter animals.
• The acanthous ornament was a favorite element in classical architecture.