| Noun | 1. | liliopsid family - family of flowering plants having a single cotyledon (embryonic leaf) in the seedfamily - (biology) a taxonomic group containing one or more genera; "sharks belong to the fish family" liliid monocot family - family of monocotyledonous plants of the subclass Liliidae; mostly herbs usually with petaloid sepals and petals and compound pistils | |