Arch. Pl. lacunars, lacunaria. [f. L. lacūnar, f. lacūna: see LACUNA.] a. The ceiling or under surface of any part, when it consists of sunk or hollowed compartments. b. pl. The sunken panels in such a ceiling.
1696. Phillips, Lacunar (in Architect.), the flooring or planking above the Porticoes; a cieled roof arched or fretted.
1727–41. in Chambers, Cycl.
1727–1800. in Bailey.
1823. P. Nicholson, Pract. Build., 58; Lacunariæ, or Lacunars, panels or coffers formed on the ceilings of apartments, and sometimes on the soffits of coronae in the Ionic, Corinthian, and Composite orders.
1845. Athenæum, 11 Jan., 48. On the grounds of the coffers forming the lacunaria of the ceilings.
