ˌhipēˈastrəm noun
Etymology: New Latin, from Greek hippeus horseman (from hippos ) + astron star; from the equitant leaves and the star-shaped flowers — more at star
1. capitalized : a genus of tropical American bulbous plants (family Amaryllidaceae) that are widely cultivated for their showy white to crimson flowers and that are sometimes included in the genus Amaryllis
2. -s : any amaryllis of the genus Hippeastrum