| Acanthaceous (a.) Armed with prickles, as a plant. |
| Acanthaceous (a.) Of, pertaining to, or resembling, the family of plants of which the acanthus is the type. |
| Acanthaceae / family Acanthaceae / acanthus family widely distributed herbs and shrubs and trees, sometimes placed in the order Scrophulariales |
| genus Acanthus bear's breeches |
| acanthus any plant of the genus Acanthus having large spiny leaves and spikes or white or purplish flowers, native to Mediterranean region but widely cultivated |
| bear's breech / bear's breeches / sea holly Acanthus mollis widely cultivated southern European acanthus with whitish purple-veined flowers |