Dictionary.net

• South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera

2006 - WordNet 3.0
By Princeton University

• South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera

2011 - English Dictionary Database
By DataStellar Co., Ltd