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Definition of Crab cactus
1. Noun. South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera. 
Exact synonyms: Schlumbergera Truncatus, Thanksgiving Cactus, Zygocactus Truncatus
Generic synonyms: Cactus
Group relationships: Genus Zygocactus, Zygocactus
Generic synonyms: Cactus
Group relationships: Genus Zygocactus, Zygocactus



