Definition of christmas cactus in English English dictionary
An epiphytic cactus (Schlumbergera ×bridgesii) of Brazilian ancestry, widely cultivated as a houseplant and having jointed flat segments with crenate margins and showy, often magenta or rose-purple flowers that bloom in winter
epiphytic cactus of Brazilian ancestry widely cultivated as a houseplant having jointed flat segments and usually rose-purple flowers that bloom in winter