de·cidu·ousBrE [dɪˈsɪdʒuəs] NAmE [dɪˈsɪdʒuəs] BrE [dɪˈsɪdjuəs] NAmE [dɪˈsɪdjuəs] adjective (of a tree, bush etc.)that loses its leaves every year compare ↑evergreen
Word Origin: [deciduous] late 17th cent.: from Latin deciduus (from decidere ‘fall down or off’) + ↑-ous.