| Noun | 1. | genus Hyacinthus - sometimes placed in family Hyacinthaceae as the type genus liliid monocot genus - genus of monocotyledonous plants comprising mostly herbs having usually petaloid sepals and petals and compound pistils family Liliaceae, Liliaceae, lily family - includes species sometimes divided among the following families: Alliaceae; Aloeaceae; Alstroemeriaceae; Aphyllanthaceae; Asparagaceae; Asphodelaceae; Colchicaceae; Convallariaceae; Hemerocallidaceae; Hostaceae; Hyacinthaceae; Melanthiaceae; Ruscaceae; Smilacaceae; Tecophilaeacea; Xanthorrhoeaceae hyacinth - any of numerous bulbous perennial herbs |