clover Any plants in the genus Trifolium, usually with leaves of three leaflets and flowers that have spiked petals. A shamrock is a type of clover that is the national symbol of Ireland. See alsoclub (shape)four-leaf cloverclover hair ornamentfour-leaf clover hair ornament Aliases: noneRevision 8 by Anonymous at 2025-04-20 23:03:09.738487