amaryllis Definition

an autumn-flowering South African bulbous herb (Amaryllis belladonna of the family Amaryllidaceae, the amaryllis family) that is grown in gardens for its clusters of large, fragrant, usually white or pink flowers which resemble lilies and are borne on long, solid, leafless stems : belladonna lily

any of various usually spring-flowering cultivars of a closely related chiefly South American bulbous herb (genus Hippeastrum) that are widely grown indoors in wintertime for their clusters of large, typically red, pink, salmon, or white, trumpet-shaped flowers which resemble lilies and are borne on long, hollow, leafless stems