| Noun | 1. | subfamily Dracaenaceae - one of two subfamilies to which some classification systems assign some members of the Agavaceae liliid monocot family - family of monocotyledonous plants of the subclass Liliidae; mostly herbs usually with petaloid sepals and petals and compound pistils Agavaceae, agave family, family Agavaceae, sisal family - chiefly tropical and xerophytic plants: includes Dracenaceae (Dracaenaceae); comprises plants that in some classifications are divided between the Amaryllidaceae and the Liliaceae |