[Christmas cactus] n [fr. its annual blooming around Christmastime] (ca. 1900): a branching Brazilian cactus (Schlumbergera truncata syn. Zygocactus truncatus) with flat stems, joints with margins having one to several blunt teeth, and showy usu. red, pink, white, or violet zygomorphic flowers--called also crab cactus
CHRISTMAS CACTUS
Meaning of CHRISTMAS CACTUS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012