- a succulent plant, Sempervivum tectorum, of the stonecrop family, native to Europe, having reddish flowers and leaves forming dense basal rosettes.
- any other plant of the genus Sempervivum.
- any Old World crassulaceous plant of the genus Sempervivum, esp S. tectorum, which has a rosette of succulent leaves and pinkish flowers: grows on walls
