The starthistle, Centaurea calcitrapa, a plant with sharp thorns.
A small, metal object with spikes arranged so that, when thrown onto the ground, one always faces up as a threat to pedestrians, horses, and vehicles.
The same object represented as a heraldic charge.
Any of a number of flowering plants in the family Zygophyllaceae, including several members of the genus Kallstroemia and the species Tribulus terrestris, native to warm temperate and tropical regions.
Centaurea, a genus in the Asteraceae containing species sometimes called centaury
Centaurium, sensu stricto
Gyrandra, a genus in Gentianaceae, formerly included in Centaurium, with species commonly called centaury
Cheirolophus crassifolius, a species in the Asteraceae commonly known as Maltese centaury
Schenkia, a genus in Gentianaceae, formerly included in Centaurium, with species commonly called centaury
Zeltnera, a New World genus in Gentianaceae, formerly included in Centaurium, with species commonly called centaury
Sabatia, a New World genus in the Gentianaceae containing species sometimes called centaury