- a North American hawthorn, Crataegus crus-galli, having leathery, toothed leaves and red fruit, cultivated as a small ornamental tree.
- a gaslight burner having three jets.
- a spur on the leg of a cock
- an annual grass, Echinochloa crus-galli, widely distributed in tropical and warm temperate regions
- a small thorny North American hawthorn tree, Crataegus crus-galli
