DAYBED - Any type of elongated seating, including the chaise longue, designed for resting rather than sleeping. It usually has a raised end.
 

DIRECTOIRE - Style of French furniture that spanned the end of the French Revolution and Napoleon's conquest in 1799. It is named for the Directory government that replaced Louis XVI and called for designs of smaller scale and less ostentation along with the elimination of regal references.
 

DROP LEAF - Hinged flap or panel that can be raised, then supported in order to increase the surface area of a table. The term now applies to such a table.