A ceiling constructed with recessed panels. (noun)
A recessed panel in such a ceiling. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "lacunar" in a sentence
"The portion which is reflected from the inguinal ligament at the pubic tubercle is attached to the pectineal line and is called the lacunar ligament."
"In addition to the deterioration of the landscape, the decline in the mangrove forest has created effects throughout the lacunar system such as the loss of habitats for a large number of species of fish, birds, and bentonic organisms."
"This platform is now submerged and gradually being covered by recent lacunar sediments."