thanksgiving cactus(n = noun.plant) crab cactus, schlumbergera truncatus, zygocactus truncatus - South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera;
is a kind of cactus
is a member of genus zygocactus, zygocactus

barrel cactus, cactus, cactus euphorbia, cactus family, cactus mouse, cactus wren, christmas cactus, crab cactus, easter cactus, garambulla cactus, golden barrel cactus, hedgehog cactus, knowlton's cactus, mistletoe cactus, orchid cactus, pitahaya cactus, prickly pear cactus, rainbow cactus, rat's-tail cactus, rattail cactus, redbird cactus, russian cactus, thanksgiving, thanksgiving day, vine cactus