n Bot. Family of monocotyledonous plants within the order Liliales. It comprises some 30 genera and more than 670 species. Its species are plants with bulbs or underground stems, long and narrow leaves, and flowers arranged in umbels.
Type genus: Allium.
From modern Latin Alliaceae; from Allium, name of a plant genus; from Latin allium, «garlic»; and the Latin suffix -aceae, «-aceous».